Q114 - Navigation General: Oceans, USCG prep certification 2026

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1. A magnetic compass card is marked in how many degrees?Not learned 2. The heading of a vessel is indicated by what part of the compass?Not learned 3. What does the lubber's line on a magnetic compass indicate?Not learned 4. A vessel heading NNW is on a course of __________.Not learned 5. A vessel heading NE is on which course?Not learned 6. A vessel heading WSW is on a course of __________.Not learned 7. A vessel heading SSE is on a course of __________.Not learned 8. Apparent wind speed blowing across a MODU under tow can be measured by a(n) __________.Not learned 9. At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?Not learned 10. At 0000 you fix your position and change course to 270°T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?Not learned 11. At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?Not learned 12. At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile west of your DR. Which statement is TRUE?Not learned 13. It is 1200 local time for an observer at 54° E longitude. Which statement is TRUE?Not learned 14. 15° of latitude is equal to __________.Not learned 15. 17 degrees of latitude is equal to __________.Not learned 16. On 25 December you observe the Sun's lower limb. The sextant altitude (hs) is 4°06.9'. The height of eye is 47-feet and the index error is 1.6' on the arc. The temperature is 19°F and the barometer reads 1030.8 millibars. What is the observed altitude (Ho)?Not learned 17. On 5 July, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?Not learned 18. On 6 July, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?Not learned 19. 90° - Ho = __________.Not learned 20. According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, where is the center of low pressure located?Not learned 21. According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, where is the center of the low pressure located?Not learned 22. How can the accuracy of an azimuth circle be checked?Not learned 23. For an accurate barometer check, you would __________.Not learned 24. What will act to dissipate fog?Not learned 25. Which action is the safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone?Not learned 26. Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?Not learned 27. In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?Not learned 28. When adjusting a magnetic compass for error, a deviation table should be made __________.Not learned 29. What is an advantage of the magnetic compass aboard vessels?Not learned 30. What is NOT an advantage of the rhumb line track over a great circle track?Not learned 31. Advection fog is most commonly caused by __________.Not learned 32. Which agency maintains federal aids to navigation?Not learned 33. Which agency publishes the Light Lists?Not learned 34. What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?Not learned 35. The agonic line on an isomagnetic chart indicates the __________.Not learned 36. Which aid is NOT marked on a chart with a magenta circle?Not learned 37. Air circulation is caused or affected by __________.Not learned 38. An air mass that has moved down from Canada would most likely have which symbols?Not learned 39. Air masses near the earth's surface __________.Not learned 40. When is an air mass termed "warm"?Not learned 41. Air temperature varies with __________.Not learned 42. Allied Naval Control of Shipping (NCS) has been established. Which statement is TRUE?Not learned 43. Altair is found in what constellation?Not learned 44. Which is TRUE of an alternating light?Not learned 45. The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. When should this procedure NOT be used?Not learned 46. How are altocumulus clouds defined?Not learned 47. An amplitude of the Sun in high latitudes __________.Not learned 48. You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?Not learned 49. What is TRUE concerning an anemometer on a moving vessel?Not learned 50. An aneroid barometer on a boat should always be __________.Not learned 51. An aneroid barometer is an instrument __________.Not learned 52. Aneroid barometers are usually calibrated to indicate atmospheric pressure in which units?Not learned 53. At what angle to the isobars do surface winds blow over the open sea?Not learned 54. Which term is the angle measured eastward from the vernal equinox along the celestial equator often expressed in time units?Not learned 55. The angle measured from the observer's meridian, clockwise or counterclockwise up to 180°, to the vertical circle of the body is known by which term?Not learned 56. Which term is given to the angle that is measured westward from the first point of Aries to the hour circle of the body along the celestial equator?Not learned 57. The angle at the pole measured through 180° From the prime meridian to the meridian of a point is known as __________.Not learned 58. Where can the annual change in variation for an area be found?Not learned 59. How is the annual rate of change for magnetic variation shown on a pilot chart?Not learned 60. Which is another name for Universal time (UTI)?Not learned 61. You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5-mile, 1 mile, and 1.5 miles. Which term is given to these unwanted echoes?Not learned 62. Antares is found in what constellation?Not learned 63. Which is a characteristic of anticyclones?Not learned 64. Aphelion is the point where the Sun __________.Not learned 65. Apparent altitude is sextant altitude corrected for __________.Not learned 66. What is Apparent time based upon?Not learned 67. The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.Not learned 68. The apparent wind is zero when which situation exists with the true wind?Not learned 69. The apparent wind is zero when the true wind is __________.Not learned 70. The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?Not learned 71. What should you apply to a fathometer reading to determine the depth of water?Not learned 72. When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.Not learned 73. As it approaches, what will a typical warm front bring?Not learned 74. You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?Not learned 75. You are approaching a light fitted with a RACON. How is the light identified on the radar?Not learned 76. You are approaching a light fitted with a RACON. The light may be identified on the radar by __________.Not learned 77. When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.Not learned 78. You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of radar?Not learned 79. The approximate distance to a storm center can be determined by noting the hourly rate of fall of the barometer. If the rate of fall is 0.08 - 0.12 inches, what is the approximate distance to the storm center?Not learned 80. What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 81. What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 82. What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS". (use charted range of 20 miles as nominal range)Not learned 83. What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 84. What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 85. What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".Not learned 86. What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer with a height of eye of 65 feet?Not learned 87. The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.Not learned 88. The approximate positions of the stars are based on sidereal time, which is based upon rotation of the Earth relative to __________.Not learned 89. What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9.5 GHz?Not learned 90. Which term is given to the arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°?Not learned 91. What area of the earth cannot be shown on a standard Mercator chart?Not learned 92. Which is an area of strong westerly winds occurring between 40°S and 60°S latitude?Not learned 93. Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?Not learned 94. Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel?Not learned 95. The ARPA may swap targets when automatically tracking if two targets are in which situation?Not learned 96. Your ARPA has been tracking a target and has generated the targets course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?Not learned 97. Your ARPA has two guard zones. What is the purpose of the inner guard zone?Not learned 98. Ascending and descending air masses with different temperatures is part of an important heat transmitting process in our atmosphere. Which term is given to this process?Not learned 99. Which are associated with Cumulonimbus clouds?Not learned 100. Astronomical refraction causes a celestial body to appear __________.Not learned 101. On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.Not learned 102. Which term describes the atmosphere in the vicinity of a high pressure area?Not learned 103. Atmospheric pressure may be measured with a(n) __________.Not learned 104. Atmospheric pressure at sea level is equal to __________.Not learned 105. You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. Where is your vessel located if the wind direction remains steady, but with diminishing velocity?Not learned 106. Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.Not learned 107. Automatic identification systems (AIS) are required to do which of the following?Not learned 108. On which of the following does an automatic identification system (AIS) transponder transmit and receive information?Not learned 109. Which two channels does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?Not learned 110. The autumnal equinox is the point where the Sun is at __________.Not learned 111. The average height of the surface of the sea for all stages of the tide over a 19 year period is known by which term?Not learned 112. What is the average speed of the movement of a hurricane following the recurvature of its track?Not learned 113. What is the average speed of movement of a hurricane prior to recurvature?Not learned 114. To avoid error, how should you read the scale of an aneroid barometer?Not learned 115. An azimuth angle for a body is measured from the __________.Not learned 116. The azimuth angle of a sun sight is always measured from the __________.Not learned 117. Barometers are calibrated at which standard temperature?Not learned 118. What does a barometer measure?Not learned 119. When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.Not learned 120. Barometer readings in weather reports are given in terms of pressure at which reference location?Not learned 121. A barometer showing falling pressure indicates the approach of a __________.Not learned 122. What is a barometric pressure reading of 29.92 inches of mercury is equivalent to?Not learned 123. The bases of middle clouds are located at altitudes of between __________.Not learned 124. What is the basic principle of the magnetic compass?Not learned 125. In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 03° 35.5'. Your height of eye is 32 feet and there is no index error. The air temperature is -10° C and the barometer reads 1010 millibars. What is the observed altitude (Ho)?Not learned 126. The beam width of your radar is 2°. The left tangent bearing of a small island, as observed on the PPI scope, is 056° pgc. If the gyro error is 2° E, what bearing would you plot on the chart?Not learned 127. Which Beaufort force indicates a wind speed of 65 knots?Not learned 128. The Beaufort scale is used to estimate which element of the weather?Not learned 129. Bellatrix is found in what constellation?Not learned 130. Which is the name given to the belt of light and variable winds between the westerly wind belt and the northeast trade winds?Not learned 131. What benefit is a weather bulletin to a mariner?Not learned 132. The Benguela Current flows in which direction?Not learned 133. Which best defines current?Not learned 134. Which defines the height of tide?Not learned 135. The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.Not learned 136. A body can only be observed at lower transit when __________.Not learned 137. You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay entrance begins at 1800 EST (ZD +5), at what time would you depart from the Chesapeake Bay entrance to have the most favorable current?Not learned 138. The Brazil Current flows in which general direction?Not learned 139. Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.Not learned 140. What is the brightest navigational planet?Not learned 141. What does a buoy with a composite group-flashing light indicate?Not learned 142. Which buoy will NOT display white retroreflective material?Not learned 143. Which of the buoys listed below could be used to mark an anchorage?Not learned 144. When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.Not learned 145. Buoys which mark dredging areas are painted which color?Not learned 146. How are buoys which mark isolated dangers painted?Not learned 147. Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?Not learned 148. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?Not learned 149. A buoy marking a wreck will show a(n) __________.Not learned 150. Which buoy may be even numbered?Not learned 151. Which buoy may be odd numbered?Not learned 152. Which buoy may be odd numbered?Not learned 153. Which buoy is NOT numbered?Not learned 154. When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?Not learned 155. A buoy having red and green horizontal bands would have which light characteristic?Not learned 156. The buoy symbol printed on your chart is leaning to the northeast. What does this indicate?Not learned 157. Which of the buoy symbols shown in illustration D032NG below indicates a safe water mark?Not learned 158. You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. Who should you report this to?Not learned 159. Capella is found in what constellation?Not learned 160. A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water is located in which quadrant?Not learned 161. Which cardinal quadrant is represented by the topmark in illustration D024NG below?Not learned 162. In most cases, the direction of the apparent wind lies between the bow and which reference point?Not learned 163. If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, which action should you take?Not learned 164. What will cause the ARPA to emit a visual alarm, audible alarm, or both?Not learned 165. What causes compass deviation?Not learned 166. Which causes the Earth's irregular heating?Not learned 167. What causes the error of collimation with regards to the four adjustments to a sextant?Not learned 168. Which is the cause of tropic tides?Not learned 169. What causes variation in a compass?Not learned 170. Which causes the wind flow from the horse latitudes to the doldrums to be deflected?Not learned 171. A celestial body's complete orbit around another body is __________.Not learned 172. A celestial body will cross the prime vertical circle when the latitude is numerically __________.Not learned 173. What celestial body may sometimes be observed in daylight?Not learned 174. The celestial coordinate of a star that is relatively constant in value is the __________.Not learned 175. In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?Not learned 176. In the celestial equator system of coordinates what is equivalent to the colatitude of the Earth system of coordinates?Not learned 177. In the celestial equator system of coordinates what is equivalent to the longitude of the Earth system of coordinates?Not learned 178. In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates?Not learned 179. In the celestial equator system of coordinates what is the equivalent to the meridians of the Earth system of coordinates?Not learned 180. The center of a circle of equal altitude, plotted on the surface of the Earth, is the __________.Not learned 181. Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location?Not learned 182. The change in the length of the day becomes greater as latitude increases because of the __________.Not learned 183. When changing from a compass course to a true course, which should you apply?Not learned 184. What is a characteristic of cardinal marks?Not learned 185. What is NOT a characteristic of cardinal marks?Not learned 186. Which characteristic and color will a preferred-channel buoy show?Not learned 187. What is characteristic of an isophase light?Not learned 188. Which characteristics will a lighted buoy that is to be left to starboard, when entering a U.S. port from seaward have?Not learned 189. Which of the following is a characteristic of a lighted cardinal mark?Not learned 190. Which would be the characteristic of an occulting light?Not learned 191. Which is a characteristic of a port side daymark?Not learned 192. What is the characteristic of a quick flashing light?Not learned 193. What is a characteristic of a rhumb line?Not learned 194. What characteristics can be used to identify a lighthouse?Not learned 195. Which is a characteristic of warm air masses?Not learned 196. Which is a characteristic of the weather preceding an approaching warm front?Not learned 197. The chart of a beach area shows a very steep slope to the underwater beach bottom. Which type of breakers can be expected when trying to land a boat on this beach?Not learned 198. On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. Which is TRUE of the red sector?Not learned 199. Charts should be corrected by using information published in which text?Not learned 200. Chart correction information is NOT disseminated through the __________.Not learned 201. A chart has extensive corrections to be made to it. When these are made and the chart is again printed, what term is given to this chart issue?Not learned 202. If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)Not learned 203. Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.Not learned 204. The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?Not learned 205. The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply?Not learned 206. Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of which organization?Not learned 207. How are chart legends which indicate a conspicuous landmark printed?Not learned 208. Chart legends printed in capital letters show that the associated landmark is __________.Not learned 209. How is a chart with a natural scale of 1:160,000 classified?Not learned 210. A chart position enclosed by a semi-circle is a(n) __________.Not learned 211. A chart position enclosed by a square is a(n) __________.Not learned 212. Which chart has a scale of 1:45,000Not learned 213. A chart with a scale of 1:80,000 would fall into which category?Not learned 214. Charts showing the coast of Mexico are produced by the United States __________.Not learned 215. On charts of U.S. waters, a magenta marking is NOT used for marking a __________.Not learned 216. Which defines the term charted depth?Not learned 217. Chronometer error may be found by __________.Not learned 218. What are Cirrus clouds primarily composed of?Not learned 219. Civil twilight begins at 1910 zone time on 20 July. Your DR position at that time is LAT 22° 16' N, LONG 150° 06' W. Which statement concerning the planets available for evening sights is TRUE?Not learned 220. Civil twilight occurs at 0558 zone time on 30 December. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Which statement concerning the planets available for morning sights is TRUE?Not learned 221. Civil twilight starts at 1812 zone time on 26 August, your DR position at that time is LAT 21°06'S, LONG 14°56'W. Which statement concerning the planets available for evening sights is TRUE?Not learned 222. Which class of tide prevails in the greatest number of important harbors on the Atlantic Coast?Not learned 223. What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?Not learned 224. What do clear skies, with the exception of a few cumulus clouds indicate?Not learned 225. On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well-defined edges and rain is falling from the dark lower edge. What should you expect if this cloud passes directly overhead?Not learned 226. The climate of the eastern coast of the Gulf of Mexico __________.Not learned 227. The climate of the northern coast of the Gulf of Mexico is _________.Not learned 228. Clouds are classified according to their __________.Not learned 229. Which cloud commonly produces a halo about the Sun or Moon?Not learned 230. Which clouds are described as high clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky"?Not learned 231. Which cloud is described as a low, dark, sheet-like cloud which is associated with continuous precipitation for many hours?Not learned 232. Which clouds are described as uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes?Not learned 233. How are clouds formed?Not learned 234. When would cloud formations be minimal?Not learned 235. How are clouds generally classified?Not learned 236. What is the name of a cloud of marked vertical development (often anvil-shaped) and produces showers?Not learned 237. Clouds with the prefix "nimbo" in their name __________.Not learned 238. A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of which front?Not learned 239. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 240. Which cloud type is normally associated with thunderstorms?Not learned 241. The Coast Guard broadcasts urgent marine storm warning messages on which of the following frequencies?Not learned 242. The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. Which describes the buoys marking this exclusion area?Not learned 243. Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.Not learned 244. A coastal chart could have a scale of __________.Not learned 245. Which is TRUE of the term coastal current?Not learned 246. When cold air displaces warm air you have a(n) __________.Not learned 247. When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.Not learned 248. A cold front moving in from the northwest can produce __________.Not learned 249. As a cold front passes how do the pressure and the winds change?Not learned 250. The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43° N to form the "cold wall" is called the __________.Not learned 251. Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the __________.Not learned 252. What color lights do lighted information markers display?Not learned 253. What is the color scheme of navigational marks used for informational or regulatory purposes?Not learned 254. What is a common unit of measure for atmospheric pressure?Not learned 255. Which is the most commonly encountered fog at sea?Not learned 256. When compared to air temperature, which factor is most useful in predicting fog?Not learned 257. Compared to a low pressure system, generally the air in a high is __________.Not learned 258. What is the compass course of a vessel heading NNE?Not learned 259. What is the compass course of a vessel heading ESE?Not learned 260. What is the compass course of a vessel heading NNW?Not learned 261. What is the compass course of a vessel heading NW?Not learned 262. What is the compass course of a vessel heading WNW?Not learned 263. What is the compass course of a vessel heading SW?Not learned 264. The compass deviation changes as the vessel changes __________.Not learned 265. Compass error is equal to the __________.Not learned 266. The compass error of a magnetic compass that has no deviation is __________.Not learned 267. Which is TRUE if the compass heading and the magnetic heading are the same?Not learned 268. The compass rose on a nautical chart indicates both variation and __________.Not learned 269. The compass rose on a nautical chart indicates both variation and which other information?Not learned 270. Which of the following compensates for errors introduced when a vessel heels over?Not learned 271. Which compensates for induced magnetism in the horizontal soft iron of a vessel?Not learned 272. Complete information on weather broadcasts throughout the world is contained in __________.Not learned 273. Where can complete information on weather broadcasts throughout the world be found?Not learned 274. Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the __________.Not learned 275. What condition exists at apogee?Not learned 276. Which condition exists in the eye of a hurricane?Not learned 277. What condition exists at perigee?Not learned 278. Which condition exists at the summer solstice in the Northern Hemisphere?Not learned 279. Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?Not learned 280. Which condition(s) is(are) necessary for the formation of dew?Not learned 281. Which condition(s) is(are) necessary for the formation of dew?Not learned 282. Which condition will occur after a cold front passes?Not learned 283. Which condition suggests that your present position lies in the navigable semicircle of a tropical storm?Not learned 284. Which conditions should a vessel entering the eye of a hurricane expect?Not learned 285. Which condition would NOT indicate the approach of a tropical storm?Not learned 286. Which condition would most likely result in fog?Not learned 287. Which conic projection chart features straight lines which closely approximate a great circle?Not learned 288. Considering the general circulation of the atmosphere, what is the name given to the wind system between latitudes 30°N and 60°N?Not learned 289. Considering the general circulation of the atmosphere, the wind system between latitudes 30° N and 60° N is commonly called the __________.Not learned 290. Which winds are consistent winds and blow from the horse latitudes to the doldrums?Not learned 291. The constellation that contains the pointer stars is __________.Not learned 292. What does not contribute to the commercial GPS receiver position error?Not learned 293. By convention, what color is the south pole of a magnet painted?Not learned 294. By convention, the Earth's south magnetic pole is which color?Not learned 295. Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets. What causes this distortion?Not learned 296. When correcting apparent altitude to observed altitude, you do NOT apply a correction for __________.Not learned 297. When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.Not learned 298. A correction for augmentation is included in the Nautical Almanac corrections for which celestial bodies?Not learned 299. Which correction(s) must be applied to an aneroid barometer?Not learned 300. The correction(s) which must be applied to an aneroid barometer reading include(s) __________.Not learned 301. The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.Not learned 302. The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.Not learned 303. Which corrector will compensate for the deviation which is maximum on intercardinal compass headings?Not learned 304. If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?Not learned 305. In which country would you expect the channels to be marked with the IALA-B Buoyage System?Not learned 306. You are on course 027°T and take a relative bearing to a lighthouse of 220°. What is the true bearing to the lighthouse?Not learned 307. You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?Not learned 308. You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?Not learned 309. You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?Not learned 310. You are on course 090°T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030°T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________.Not learned 311. You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?Not learned 312. While on a course of 138°T, a light bears 14° on the starboard bow at a distance of 8.6 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard?Not learned 313. You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 314. You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?Not learned 315. You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?Not learned 316. You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?Not learned 317. You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse?Not learned 318. You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 319. You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?Not learned 320. You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?Not learned 321. You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse?Not learned 322. You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?Not learned 323. When crossing a front how do isobars tend to change?Not learned 324. Which of the following should be done when crossing the magnetic equator?Not learned 325. Cumulonimbus clouds are formed by __________.Not learned 326. Cumulonimbus clouds are most likely to accompany a(n) __________.Not learned 327. What do cumulus clouds that have undergone vertical development and have become cumulonimbus in form indicate?Not learned 328. Which is TRUE when a current flows in the opposite direction to the waves?Not learned 329. What current flows southward along the west coast of the United States and causes extensive fog in that area?Not learned 330. Which current is in many respects, similar to the Gulf Stream?Not learned 331. When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?Not learned 332. Current refers to the __________.Not learned 333. Which current is responsible for the movement of large quantities of ice into the North Atlantic shipping lanes?Not learned 334. If the current and wind are in the same direction, the sea surface represents a wind speed __________.Not learned 335. If the current and wind are in opposite directions, the sea surface represents __________.Not learned 336. Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?Not learned 337. Which current would you encounter on a direct passage from southern Africa to Argentina, South America?Not learned 338. A cyclone in its final stage of development is called a(n) __________.Not learned 339. In a cyclone, where is the lowest pressure found?Not learned 340. Cyclones tend to move __________.Not learned 341. Which is the only cylindrical chart projection widely used for navigation?Not learned 342. The Daily Memorandum contains which information?Not learned 343. The daily path of a celestial body that is parallel to the celestial equator is the __________.Not learned 344. The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.Not learned 345. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 346. The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.Not learned 347. Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?Not learned 348. The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.Not learned 349. Which data must ECDIS be able to record at one-minute intervals?Not learned 350. Which data must ECDIS be able to record at one-minute intervals?Not learned 351. Where can information about the direction and velocity of rotary tidal currents be found?Not learned 352. Which term is used to describe the database information that should be shown when a chart is first displayed on ECDIS?Not learned 353. Which term is given to the database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner?Not learned 354. The date is the same all over the world at __________.Not learned 355. The datum from which the predicted heights of tides are reckoned in the tide tables is __________.Not learned 356. The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.Not learned 357. Which datum is used for soundings on charts of the East Coast of the United States?Not learned 358. During daylight hours black double-cone topmarks are the most important feature of cardinal marks. Which of the four topmarks shown in illustration D030NG below indicates the best navigable water lies to the west of the buoy?Not learned 359. Daylight savings time is a form of zone time that adopts the time __________.Not learned 360. When daylight savings time is kept, the times of tide and current calculations must be adjusted. How can this be accomplished?Not learned 361. During daylight savings time the meridian used for determining the time is located farther __________.Not learned 362. A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated by what letter in illustration D045NG below?Not learned 363. Which is TRUE of a dead reckoning (DR) plot?Not learned 364. A dead reckoning (DR) plot __________.Not learned 365. When should your dead reckoning position be plotted?Not learned 366. When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.Not learned 367. A decrease in barometric pressure is associated with all of the following except __________.Not learned 368. Defense plans may cause the operation of electronic aids to navigation to be suspended with __________.Not learned 369. What defines a great circle?Not learned 370. Which defines an isotherm?Not learned 371. Which defines a light's luminous range?Not learned 372. The range of tide is the __________.Not learned 373. Which defines the shortest distance between any two points on earth?Not learned 374. Which defines the term relative humidity?Not learned 375. Which defines a wave's fetch?Not learned 376. What is the definition of height of tide?Not learned 377. Deneb is found in what constellation?Not learned 378. Denebola is found in what constellation?Not learned 379. The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.Not learned 380. The depth of water on a chart is indicated as 23 meters. What does that depth convert to?Not learned 381. The depth of the water is indicated on a chart as 32 meters. What is this equal to?Not learned 382. What describes an accurate position that is NOT based on any prior position?Not learned 383. The vertical distance from the tidal datum to the level of the water is the __________.Not learned 384. Which describes a diurnal tide?Not learned 385. What describes an ebb current?Not learned 386. What describes a flood current?Not learned 387. Which describes the level of database information which cannot be removed from the ECDIS display and consists of information which is required at all times in all geographic areas and under all circumstances?Not learned 388. Which describes a light having characteristics which include color variations?Not learned 389. Which describes a line of position derived by radar range from an identified point on a coast?Not learned 390. Which describes the precession of the equinoxes of the Earth?Not learned 391. Which is TRUE concerning privately maintained aids to navigation included in the Light List?Not learned 392. Which describes the result when you turn on the fast time constant (differentiator) control of a radar?Not learned 393. Which describes the visible range marked on charts for lights?Not learned 394. Which describes the wind circulation around a high-pressure center in the Northern Hemisphere?Not learned 395. What is the direction of rotation of tropical cyclones, tropical storms and hurricanes in the Northern Hemisphere?Not learned 396. What does the description "Racon" beside an illustration on a chart mean?Not learned 397. It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at which time interval?Not learned 398. Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.Not learned 399. You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.Not learned 400. You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.Not learned 401. You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?Not learned 402. When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.Not learned 403. Deviation is the angle between the __________.Not learned 404. Deviation is caused by __________.Not learned 405. Deviation in a compass is caused by which of the following?Not learned 406. Deviation which is maximum on intercardinal compass headings may be removed by the __________.Not learned 407. The dew point is reached when which condition occurs?Not learned 408. Which is TRUE concerning the dew point temperature?Not learned 409. The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.Not learned 410. The difference in degrees between true north and magnetic north is called __________.Not learned 411. Which is the difference between the DR position and a fix, both of which have the same time?Not learned 412. The difference between the heights of low and high tide is the __________.Not learned 413. The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.Not learned 414. The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.Not learned 415. What is the difference in local time between an observer on 114°W and one on 119°W?Not learned 416. The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.Not learned 417. The direction of prevailing winds in the Northern hemisphere is caused by the __________.Not learned 418. The direction of the southeast trade winds is a result of the __________.Not learned 419. The direction of the surface wind is __________.Not learned 420. The direction a vessel is pointed at any given time is the __________.Not learned 421. The direction in which a vessel is steered is the course. The path actually followed is the __________.Not learned 422. The direction in which a vessel should be steered between two points is known by which term?Not learned 423. Which is TRUE for the directive force acting on a gyrocompass?Not learned 424. Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, which is TRUE of the current?Not learned 425. Distance along a track line is measured on a Mercator chart by using which method?Not learned 426. What is the distance from the bottom of a wave trough to the top of a wave crest?Not learned 427. The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?Not learned 428. Which term defines the distance in miles between the circle of equal altitude for the observed altitude (Ho) and the circle of equal altitude for the computed altitude (Hc)?Not learned 429. The distance to the nearest vertex from any point on a great circle track cannot exceed __________.Not learned 430. The distance between any two meridians measured along a parallel of latitude __________.Not learned 431. The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.Not learned 432. Diurnal aberration is due to __________.Not learned 433. The diurnal inequality of the tides is caused by __________.Not learned 434. The diurnal pressure variation is most noticeable in the __________.Not learned 435. The diurnal variation of pressure is most noticeable __________.Not learned 436. The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.Not learned 437. Which is the dividing meridian between zone descriptions -10 and -11?Not learned 438. The dividing meridian between zone descriptions -2 and -3 is __________.Not learned 439. Which is the dividing meridian between zone descriptions -4 and -5?Not learned 440. The dividing meridian between zone descriptions +4 and +5 is __________.Not learned 441. The dividing meridian between zone descriptions +7 and +8 is __________.Not learned 442. Which is the dividing meridian between zone descriptions -7 and -8?Not learned 443. In the doldrums you will NOT have __________.Not learned 444. How are the doldrums characterized?Not learned 445. In the doldrums you can expect __________.Not learned 446. What does a Doppler log in the bottom return mode indicate?Not learned 447. A Doppler log in the volume reverberation mode indicates __________.Not learned 448. When does a Doppler speed log indicate speed over ground?Not learned 449. A Doppler speed log indicates speed over ground __________.Not learned 450. A Doppler speed log indicates speed through the water __________.Not learned 451. A double star is a star that __________.Not learned 452. When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.Not learned 453. What does the drift and set of tidal, river, and ocean currents refer to?Not learned 454. The dry bulb temperature is 78°F and the wet bulb temperature is 62°F. What is the relative humidity?Not learned 455. The dry-bulb temperature is 78°F (26°C) and the wet-bulb temperature is 68°F (20°C). What is the relative humidity?Not learned 456. The dry bulb temperature is 91°F (32.8°C) and the wet bulb temperature is 87°F (30.6°C). What is the relative humidity?Not learned 457. When a dual-purpose marking is used, how should the mariner following the Intracoastal Waterway be guided?Not learned 458. Early indications of the approach of a hurricane may be all of the following EXCEPT __________.Not learned 459. The Earth has the shape of a(n) __________.Not learned 460. An easterly wave is located 200 miles due west of your position, which is north of the equator. Where will the wave be in 24 hours?Not learned 461. What is an ebb current?Not learned 462. ECDIS must be able to perform all of the following EXCEPT __________.Not learned 463. The ECDIS must have the capability to preserve the record of the voyage track. How many hours of the previous track are required to be maintained?Not learned 464. ECDIS must give an alarm for which of the following cases?Not learned 465. ECDIS must give an alarm for which of the following cases?Not learned 466. ECDIS must give an alarm for which of the following cases?Not learned 467. An ECDIS is required to display which information?Not learned 468. An ECDIS is required to display which information?Not learned 469. An ECDIS is required to display which information?Not learned 470. ECDIS units incorporate Digital Chart Data Formats, which include __________.Not learned 471. ECDIS units incorporate Digital Chart Data that utilizes which formats?Not learned 472. All echo-sounders can measure the __________.Not learned 473. The ecliptic is __________.Not learned 474. The edge of a hurricane has overtaken your MODU in the Gulf of Mexico and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.Not learned 475. When does the effects of priming of the tides occur?Not learned 476. Eight points of a compass are equal to how many degrees?Not learned 477. If the electronic chart is part of an ECDIS, it must display the minimum data required by IMO/IHO. Which is NOT required to be displayed?Not learned 478. An electronic depth finder operates on which principle?Not learned 479. Electronic Plotting Aid (EPA) has which built in functions?Not learned 480. Electronic Plotting Aid (EPA) has which built in functions?Not learned 481. An Electronic Plotting Aid (EPA) will drop off a target's vector if more than __________ minutes elapse between each manual plot.Not learned 482. What enables you to estimate the bearing of a storm's center?Not learned 483. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer and running time at 13 knots to intercept vessel A?Not learned 484. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T, 68 miles from you. What is the time to intercept if you make 13 knots?Not learned 485. You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 346°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?Not learned 486. You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer and running time at 13 knots to intercept vessel A?Not learned 487. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?Not learned 488. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the time to intercept if you make 13 knots?Not learned 489. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer and running time at 16 knots to intercept vessel A?Not learned 490. You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T, 43 miles from you. What is the time to intercept if you make 16 knots?Not learned 491. You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042° at 105 miles from you. What is the course to steer at 10 knots to intercept vessel A?Not learned 492. You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?Not learned 493. You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?Not learned 494. You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133? T, and bears 343? T at 92 miles from you. What is the time to intercept if you make 9 knots?Not learned 495. You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.Not learned 496. You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. What does it indicate if the wind veers steadily?Not learned 497. As you enter a channel from seaward in a U.S. port, which is TRUE of the numbers on the starboard side buoys?Not learned 498. As you enter a U.S. channel from seaward, which is TRUE concerning the numbers on the buoys?Not learned 499. You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?Not learned 500. When entering a channel from seaward, the numbers on buoys __________.Not learned 501. You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate?Not learned 502. While entering a harbor on a course of 225° per gyrocompass, you take a bearing on a pair of range lights and get 220° per gyrocompass. The bearing on the chart is 217°T. The variation for the area is 6°W, and deviation is 2°W. What course would you steer per gyrocompass to make good a true course of 232°?Not learned 503. You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown in illustration D047NG below, on your starboard beam. What action should you take?Not learned 504. In IALA Region B, entering from sea, how would a daymark on the port side of the channel be indicated on a chart?Not learned 505. When entering from seaward, what does a buoy displaying a composite group (2+1) flashing red light indicate?Not learned 506. When entering from seaward, what does a buoy displaying a single-flashing red light indicate?Not learned 507. The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?Not learned 508. The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian?Not learned 509. The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at what time?Not learned 510. The equation of time measures the __________.Not learned 511. When the equation of time is taken from the Nautical Almanac for use in celestial navigation, what is it used to determine?Not learned 512. Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?Not learned 513. The equator is __________.Not learned 514. What is the equivalent of 0? 48' in time units?Not learned 515. What is the equivalent of 0 min. 16 sec. in arc units?Not learned 516. What is the equivalent of 1? 53' in time units?Not learned 517. What is the equivalent of 10? 48' in time units?Not learned 518. What is the equivalent of 10 min. 52 sec. in arc units?Not learned 519. What is the equivalent of 2° 35' in time units?Not learned 520. What is the equivalent of 2? 52' in time units?Not learned 521. What is the equivalent of 23 min. 20 sec. in arc units?Not learned 522. What is the equivalent of 37 min. 32 sec. in arc units?Not learned 523. What is the equivalent of 4°36' in time units?Not learned 524. What is the equivalent of 4 min. 04 sec. in arc units?Not learned 525. What is the equivalent of 42 min. 48 sec. in arc units?Not learned 526. What is the equivalent of 47 min. 20 sec. in arc units?Not learned 527. What is the equivalent of 5? 54' in time units?Not learned 528. What is the equivalent of 8 min. 56 sec. in arc units?Not learned 529. What is the equivalent of 83°29.6' in time units?Not learned 530. Which error is NOT included in the term "current" when used in relation to a fix?Not learned 531. The error in a sextant altitude caused by refraction is greatest when the celestial body is in which location?Not learned 532. At the establishment of Naval Control of Shipping (NCS), ships at sea will __________.Not learned 533. How can you estimate the position of a tropical storm's center?Not learned 534. At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?Not learned 535. Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________.Not learned 536. What should you expect when you encounter a tsunami in the open ocean?Not learned 537. You can expect frontal activity when two air masses collide and __________.Not learned 538. What does the expression "the air is saturated" mean?Not learned 539. The expression "first Magnitude" is usually used to refer only to bodies of which magnitude?Not learned 540. The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the __________.Not learned 541. Your weather chart indicates that you will cross the cold front of a low-pressure system in about 24 hours. Which statement is TRUE?Not learned 542. Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?Not learned 543. Which factor(s) is/are used to develop the charted information of a lighthouse?Not learned 544. Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?Not learned 545. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 546. To find a magnetic compass course from a true course what must you apply?Not learned 547. Where do you find the semidiameter correction to be used to correct sextant observations of the stars?Not learned 548. To find the specific phase characteristic of a lighthouse on a sound of the United States you would use which reference?Not learned 549. Which can you use to indicate the bearing of the center of a hurricane or tropical storm?Not learned 550. The first indications a mariner will have of the approach of a warm front will be __________.Not learned 551. Which is TRUE concerning a first magnitude star?Not learned 552. The first point of Aries is the point where the Sun is at __________.Not learned 553. The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.Not learned 554. What is the FIRST sign of the existence of a well-developed tropical cyclone?Not learned 555. What is the first visible indication of the presence of a tropical cyclone or hurricane?Not learned 556. What does the Flinders bar on a magnetic compass compensate for?Not learned 557. The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?Not learned 558. The flow of air around an anticyclone in the Southern Hemisphere is __________.Not learned 559. Fog is most commonly associated with a(n) __________.Not learned 560. Fog forms when which condition exists?Not learned 561. Fog forms when the air temperature is at or below __________.Not learned 562. Fog is formed when __________.Not learned 563. Fog generally clears when the __________.Not learned 564. Fog is likely to occur when there is little difference between the dew point and the __________.Not learned 565. Which fog is produced by warm moist air passing over a cold surface?Not learned 566. How can you follow the approach of a dangerous cyclonic storm?Not learned 567. Which of the following is the most accurate method of determining gyrocompass error while underway?Not learned 568. In which of the following does the arc of a great circle pass through a body and the celestial poles?Not learned 569. Which of the following is associated with consistently high barometric pressure?Not learned 570. Which item is NOT associated with cumulonimbus clouds?Not learned 571. Which of the following is a boundary between two air masses?Not learned 572. Which of the following causes the development of an occluded front?Not learned 573. Which of the following causes a frontal thunderstorm?Not learned 574. Which of the following are data layer categories to be displayed on ECDIS?Not learned 575. Which of the following data layer categories is NOT displayed on ECDIS?Not learned 576. Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass?Not learned 577. Which of the following describes the principal purpose of magnetic compass adjustment?Not learned 578. Which of the following is NOT a form of precipitation?Not learned 579. All of the following can be found on a Pilot Chart EXCEPT information concerning which item?Not learned 580. Which of the following must an ECDIS system be able to perform?Not learned 581. Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?Not learned 582. Which of the following represents the slope of a warm front?Not learned 583. Which of the following is a standard correction applied to the reading of an aneroid barometer?Not learned 584. Which of the following statements concerning frontal movements is TRUE?Not learned 585. Which of the following statements is FALSE?Not learned 586. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 587. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 588. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 589. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 590. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 591. Which of the following traits possessed by an articulated light makes it superior to other types of buoys?Not learned 592. Which of the following typically happens to the barometric pressure after a cold front passes?Not learned 593. Which of the following is the most useful factor for predicting weather?Not learned 594. Fomalhaut is found in what constellation?Not learned 595. The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.Not learned 596. Which form of cloud, that is often known as "mackerel sky", is generally associated with fair weather?Not learned 597. Which form of navigation may be suspended without notice under defense planning?Not learned 598. Which of the four adjustable errors in the sextant causes side error?Not learned 599. Which of the four adjustable errors in the sextant is the principle cause of index error?Not learned 600. Of the four light characteristics shown in illustration D019NG below which one does NOT represent a safe water mark of the IALA Buoyage System?Not learned 601. The four standard light colors used for lighted aids to navigation are red, green, white, and __________.Not learned 602. Freezing salt water spray should be anticipated when the air temperature drops below what temperature?Not learned 603. Which frontal system occurs when a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass?Not learned 604. What is the function of a red triangular daymark?Not learned 605. A gale is characterized by a wind speed of __________.Not learned 606. A general chart could have a scale of __________.Not learned 607. In general, the most effective period for observing stars and planets occurs during the darker limit of __________.Not learned 608. General information on enroute weather and climate is found in __________.Not learned 609. General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?Not learned 610. In general, on how many radio channels will an automatic identification system (AIS) operate?Not learned 611. Which general weather conditions should you expect to find in a low-pressure system?Not learned 612. A generally circular low pressure area is called a(n) __________.Not learned 613. What generally occurs when the land is cooler than the nearby water?Not learned 614. Generally speaking, you should expect to find low atmospheric pressure prevailing in the earth's __________.Not learned 615. Generally speaking, in the Northern Hemisphere, when winds are blowing from between SE and SW the barometric reading __________.Not learned 616. Generally speaking, a ship steaming across the North Pacific from Japan to Seattle is likely to experience __________.Not learned 617. What is the geographic longitude of a body whose GHA is 215°15'?Not learned 618. What is the geographic longitude of a body whose GHA is 232°27'?Not learned 619. The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet?Not learned 620. The GHA of a star __________.Not learned 621. Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?Not learned 622. The GMT is 0445 and your zone description is +1. What is your zone time?Not learned 623. At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?Not learned 624. If the GMT is 1500, the time at 75? E longitude is __________.Not learned 625. On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.Not learned 626. Good weather is usually associated with a region of __________.Not learned 627. Which government agency publishes the U.S. Coast Pilot?Not learned 628. The GP of a body for a high altitude sight is determined from the Greenwich hour angle and the __________.Not learned 629. Most GPS receivers use the Doppler shift of the carrier phase to compute __________.Not learned 630. What great circle is always needed to form the astronomical triangle?Not learned 631. Which term is given to the great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon?Not learned 632. The great circle on the celestial sphere that passes through the zenith and the north and south poles is the __________.Not learned 633. A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?Not learned 634. A great circle will intersect the equator at how many degrees of longitude apart?Not learned 635. In which situation does a great circle track provides the maximum saving in distance?Not learned 636. The greater the pressure difference between a high and a low-pressure center, the __________.Not learned 637. When is the greatest directive horizontal force exerted on the magnetic compass of a vessel?Not learned 638. A green buoy has a yellow triangle on it. What type of buoy is this?Not learned 639. Red lights may appear on which buoys?Not learned 640. A group of stars which appear close together and form a striking configuration such as a person or animal is a __________.Not learned 641. If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?Not learned 642. What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?Not learned 643. Which term is given to that half of the hurricane to the right-hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere?Not learned 644. Which handheld instrument is used to measure distances between objects and the ship?Not learned 645. What happens because of augmentation?Not learned 646. What happens to the barometric pressure after a cold front passes?Not learned 647. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 648. A harbor chart could have a scale of __________.Not learned 649. How often is The Local Notice to Mariners updated?Not learned 650. You are heading in a northerly direction when you come across an easterly current. Your vessel will respond in which manner?Not learned 651. You are heading out to sea in a buoyed channel and see a quick flashing green light on a buoy ahead of you. In U.S. waters, how should you leave the buoy?Not learned 652. Heeling error is defined as the change of deviation for a heel of __________.Not learned 653. The height of a light is measured from which reference plane?Not learned 654. The height of a wave is the vertical distance from which reference points?Not learned 655. In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and __________.Not learned 656. In very high latitudes, the most practical chart projection is the __________.Not learned 657. Most high pressure areas in the United States are accompanied by __________.Not learned 658. As a high pressure system approaches, the barometer reading __________.Not learned 659. As a high-pressure system approaches, which is TRUE concerning the barometer reading?Not learned 660. Which is TRUE when a high pressure system is centered north of your vessel in the Northern Hemisphere?Not learned 661. The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during which time frame?Not learned 662. Which system provides the highest level of commercial navigational accuracy?Not learned 663. The horizon glass of a sextant is __________.Not learned 664. In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?Not learned 665. In the horizon system of coordinates what is equivalent to the declination of the equator system?Not learned 666. In the horizon system of coordinates what is equivalent to the equator on the Earth?Not learned 667. In the horizon system of coordinates what is equivalent to latitude on the Earth?Not learned 668. In the horizon system of coordinates what is equivalent to the local hour angle of the celestial equator system?Not learned 669. In the horizon system of coordinates what is equivalent to longitude on the Earth?Not learned 670. In the horizon system of coordinates what is the equivalent to the meridians on the Earth?Not learned 671. In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?Not learned 672. In the horizon system of coordinates what is equivalent to the poles on the Earth?Not learned 673. What is the term used for the horizontal angle between the magnetic meridian and the north-south line axis line of the magnetic compass?Not learned 674. The horse latitudes are characterized by __________.Not learned 675. The "horse latitudes" are regions of __________.Not learned 676. Hot air can hold __________.Not learned 677. The Humboldt Current flows in which direction?Not learned 678. A hurricane is characterized by winds of which speed?Not learned 679. Hurricanes may move in any direction. However, it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves in which direction?Not learned 680. A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT __________.Not learned 681. When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.Not learned 682. The hurricane season in the North Atlantic Ocean reaches its peak during which month?Not learned 683. If a hurricane several hundred miles away is moving in your general direction your barometer would __________.Not learned 684. A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.Not learned 685. A hygrometer is a device used for determining __________.Not learned 686. Under the IALA-A and B Buoyage Systems, what does a buoy with alternating red and white vertical stripes indicate?Not learned 687. Under the IALA-B Buoyage System, which is TRUE of a buoy displaying a red light?Not learned 688. Under the IALA-B Buoyage System, a conical buoy will be __________.Not learned 689. Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be which color?Not learned 690. Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which of the topmarks shown in illustration D046NG below?Not learned 691. The IALA Buoyage Systems do NOT apply to __________.Not learned 692. In the IALA Buoyage System, what do buoys with alternating red and green horizontal bands indicate?Not learned 693. Under the IALA-A Buoyage System, a buoy indicating that the preferred channel is to port when entering from seaward, can have a __________.Not learned 694. Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.Not learned 695. Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have which feature?Not learned 696. Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may have which feature?Not learned 697. Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?Not learned 698. Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.Not learned 699. Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have which of the following?Not learned 700. Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.Not learned 701. In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.Not learned 702. Under the IALA Buoyage Systems, a safe water mark may NOT __________.Not learned 703. Under the IALA Buoyage Systems, safe water marks may show a __________.Not learned 704. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?Not learned 705. Under the IALA Buoyage Systems, which is TRUE of the topmark of a red and white vertically-striped buoy?Not learned 706. Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark?Not learned 707. Under the IALA Buoyage Systems, which is TRUE of safe water marks?Not learned 708. Under the IALA Buoyage Systems, a yellow buoy may mark __________.Not learned 709. Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is in which location?Not learned 710. Under the IALA cardinal system, what does a mark with a quick white light showing 6 flashes followed by one long flash indicate in relation to the location of the safest water?Not learned 711. In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate?Not learned 712. Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?Not learned 713. In illustration D009NG below, your position X is at LAT 35° S. Which winds are you experiencing?Not learned 714. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 715. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 716. In illustration D039NG below, which number indicates cirrus clouds?Not learned 717. In illustration D039NG below, what type of cloud is indicated by the number five?Not learned 718. In illustration D039NG below, what type of cloud is indicated by the number four?Not learned 719. In illustration D039NG below, what type of cloud is indicated by the number one?Not learned 720. In illustration D044NG below, a pillar buoy is indicated by which letter?Not learned 721. In illustration D044NG below, what type of buoy is indicated by the letter A?Not learned 722. In illustration D045NG below, what two shapes shown are used to indicate a preferred channel?Not learned 723. In illustration D051NG below what is indicated by the position labeled "C"?Not learned 724. In illustration D051NG below, why was the position labeled "C" plotted?Not learned 725. In illustration D051NG below, why was the position labeled "E" plotted?Not learned 726. In illustration D051NG below, why was the position labeled "D" plotted?Not learned 727. The immediate surroundings of what constellation contain the most first magnitude stars?Not learned 728. What is the MOST important feature of the material used for making the binnacle of a standard magnetic compass?Not learned 729. The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________.Not learned 730. Which is the most important information to be obtained from a barometer?Not learned 731. An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?Not learned 732. What is the most important source of information to be used in correcting charts and keeping them up to date?Not learned 733. If it is impossible to avoid a hurricane in the Northern Hemisphere, which is the most favorable place to be when the storm passes?Not learned 734. You are inbound in a channel marked by a range. The range line is 040°T. You are steering 036°T. The range is in sight as shown in illustration D047NG below, and is closing. Which action should you take?Not learned 735. You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown in illustration D047NG below. The range continues to open. What action should you take?Not learned 736. You are inbound in a channel marked by a range. The range line is 216°T. You are steering 213°T and have the range in sight as shown in illustration D048NG below. Which action should you take?Not learned 737. The index error is determined by adjusting the __________.Not learned 738. What is the primary cause of index error of a sextant?Not learned 739. When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.Not learned 740. What indicates the arrival of a hurricane within 24 to 36 hours?Not learned 741. What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)Not learned 742. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?Not learned 743. Which indication on the barometer is most meaningful in forecasting weather?Not learned 744. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 745. An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?Not learned 746. What will NOT induce errors into a Doppler sonar log?Not learned 747. Where is induced magnetism found?Not learned 748. Inferior conjunction is possible for __________.Not learned 749. Which is an inferior planet?Not learned 750. Information about currents around Pacific Coast ports of the U.S. can be obtained in which publication?Not learned 751. What information is found in the chart title?Not learned 752. What information is NOT found in the chart title?Not learned 753. Which information is found in the chart title?Not learned 754. Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?Not learned 755. Which of the sources contains information on Northern Right Whales?Not learned 756. Which information does the outer ring of a compass rose on a nautical chart provide?Not learned 757. Information about the pilotage available at Miami harbor may best be obtained from which publication?Not learned 758. Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?Not learned 759. Which information is NOT required to be posted in or near the wheelhouse?Not learned 760. Which text contains information on search and rescue procedures and special, local communications used in Mexican waters?Not learned 761. Which item contains information about temporary, short-term changes affecting the safety of navigation in U.S. waters?Not learned 762. Where can information for updating paper nautical charts primarily be found?Not learned 763. How are you informed of defects or changes in aids to navigation?Not learned 764. You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?Not learned 765. The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?Not learned 766. The instrument most commonly used to gather the data for determining the relative humidity is the __________.Not learned 767. An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.Not learned 768. An instrument that indicates wind direction is known as a(n) __________.Not learned 769. An instrument that maintains a continuous record of humidity changes is called a __________.Not learned 770. An instrument which maintains a continuous record of temperature changes is called a __________.Not learned 771. Which instrument may a towing vessel, engaged in towing exclusively on the Western Rivers, use in place of a magnetic compass?Not learned 772. What is used to measure wind velocity?Not learned 773. Which instrument is used to measure the relative humidity of the air?Not learned 774. Which instrument is used to predict the approach of a low pressure system?Not learned 775. An instrument useful in predicting fog is the __________.Not learned 776. How is the intensity of a light expressed in the Light Lists?Not learned 777. At which interval should a traditional spring driven marine chronometer be rewound?Not learned 778. After inventorying the Naval Control of Shipping publications you find there is no copy of ATP-2, Volume II "Allied Control of Shipping Manual - Bridge Supplement". You should ask for a replacement from the __________.Not learned 779. Isobars on a weather map are useful in predicting which element of the weather?Not learned 780. What do isogonic lines on a chart indicate?Not learned 781. Isogonic lines are lines on a chart indicating __________.Not learned 782. On an isomagnetic chart, the line of zero variation is the __________.Not learned 783. On an isomagnetic chart, which term is used for the line of zero variation?Not learned 784. Which item in illustration D034NG below shows a flashing light?Not learned 785. Which item in illustration D034NG below shows a MorseNot learned 786. Which item in illustration D034NG below shows an occulting light?Not learned 787. After an item of required safety equipment on a towing vessel fails, the owner or Master must consider numerous factors before continuing the voyage. Which factor should NOT be included in his/her decision?Not learned 788. Which is TRUE of a katabatic wind?Not learned 789. Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?Not learned 790. What kind of pressure systems travel in tropical waves?Not learned 791. What kind of weather would you expect to accompany the passage of a tropical wave?Not learned 792. A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015NG below?Not learned 793. A large group of stars revolving around a center is known as a __________.Not learned 794. The largest of the navigational planets is __________.Not learned 795. The largest waves (heaviest chop) will usually develop where the wind blows __________.Not learned 796. From LAT 07° 12' N, LONG 80° 00' W, to LAT 47° 12' S, LONG 169° 18' E, the initial great circle course angle is 137.25°. How would you name this course?Not learned 797. Which is TRUE of a lateral system buoy displaying a quick flashing light?Not learned 798. A latitude line will be obtained by observing a body __________.Not learned 799. The latitude of the upper vertex of a great circle is 36°N. What is the latitude of the lower vertex?Not learned 800. The left half of the storm is called the navigable semicircle because __________.Not learned 801. What is the length of the lunar day?Not learned 802. What is the length of a nautical mile?Not learned 803. The length of a wave is the length __________.Not learned 804. What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?Not learned 805. A very light breeze that causes ripples on a small area of still water is a known by which term?Not learned 806. Which light characteristic may be used on a special mark?Not learned 807. Which light characteristic may be used on a special purpose mark?Not learned 808. Which term describes a light, feathery deposit of ice by sublimation of water vapor directly into the crystalline form on objects whose temperatures are below freezing?Not learned 809. When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. Which term is given to this process?Not learned 810. Which term is given to a light that has a light period shorter than its dark period?Not learned 811. Which is TRUE concerning Light Lists for coastal waters?Not learned 812. The Light List Does NOT contain information on __________.Not learned 813. The Light List indicates that a dayboard is a type TR-SY. Which action should you take?Not learned 814. The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?Not learned 815. The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?Not learned 816. The Light List indicates that a light has a nominal range of 8 miles and is 48 feet(14.6 meters) high. If the visibility is 6 miles and your height of eye is 35 feet(10.7 meters), at what approximate distance will you sight the light?Not learned 817. The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6 meters). Your height of eye is 52 feet (15.8 meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light?Not learned 818. The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?Not learned 819. The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?Not learned 820. The Light List shows that a navigational light has a nominal range of 18 miles and a height above water of 22 feet (6.7 meters). Your height of eye is 16 feet (4.9 meters) and the visibility is 2.0 miles. At which approximate range will you first sight the light?Not learned 821. The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?Not learned 822. The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?Not learned 823. What is the light phase characteristic of a lighted isolated-danger mark?Not learned 824. The light rhythm of MorseNot learned 825. Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?Not learned 826. Which would you expect to see on a lighted preferred-channel buoy?Not learned 827. What is a lighted safe water mark fitted with to aid in its identification?Not learned 828. Lighted white and orange buoys must show which color light?Not learned 829. A lighthouse is 120 feet (36.6 meters) high and the light has a nominal range of 18 miles. Your height of eye is 42 feet (12.8). If the visibility is 11 miles, approximately how far off the light will you be when the light becomes visible?Not learned 830. What is the name given to lines on a chart which connect points of equal magnetic variation?Not learned 831. A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.Not learned 832. The line connecting the points of the earth's surface where there is no dip is the __________.Not learned 833. A line connecting all possible positions of your vessel at any given time is a __________.Not learned 834. The line which connects the points of zero magnetic dip is __________.Not learned 835. Lines drawn through points on the Earth having the same atmospheric pressure are known by which term?Not learned 836. A line on the Earth parallel to the equator is a __________.Not learned 837. A line of position is __________.Not learned 838. A line of position from a celestial observation is a segment of which choice?Not learned 839. The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.Not learned 840. A line of position formed by sighting two charted objects in line is called a(n) __________.Not learned 841. Lines of position may be __________.Not learned 842. The line of position should be plotted as a circle around the GP of the body when the Ho exceeds what minimum value?Not learned 843. Which term is given to a line on a weather chart connecting places which have the same barometric pressure?Not learned 844. Which list of clouds is in sequence, from highest to lowest in the sky?Not learned 845. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?Not learned 846. Which of the listed properties does warm air possess?Not learned 847. Little or no change in the barometric reading over a twelve hour period indicates __________.Not learned 848. The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?Not learned 849. The LMT of sunrise on the standard meridian is 0552. Your longitude is 99? 15' E. What is your ZT of sunrise?Not learned 850. The Local mean time of LAN is 1152. Your longitude is 73? 15' E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?Not learned 851. Local sidereal time is equal to the __________.Not learned 852. A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a __________.Not learned 853. You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.Not learned 854. Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?Not learned 855. Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?Not learned 856. Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January?Not learned 857. Which location is a source for an air mass labeled mTw?Not learned 858. You should log all barometer readings taken at sea __________.Not learned 859. You are in LONG 144? E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.Not learned 860. You are in LONG 165°E, zone time at 0400, 1 November. What is the zone time and date in LONG 165°W?Not learned 861. How long would a steady wind need to blow in order to create a wind driven current?Not learned 862. Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. Which is the mean time and date at Greenwich?Not learned 863. Your longitude is 179°59'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59'E longitude. What is your LMT and date?Not learned 864. What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'?Not learned 865. The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?Not learned 866. Why are low altitude sun sights not generally used?Not learned 867. A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.Not learned 868. In low latitudes, the full Moon will always rise at about __________.Not learned 869. In low latitudes, the high(s) of the diurnal variation of pressure occur(s) at __________.Not learned 870. In low latitudes, a last quarter moon will always rise at about __________.Not learned 871. In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.Not learned 872. In low latitudes, the new Moon will always rise at about __________.Not learned 873. In low latitudes the range of the diurnal variation of pressure is up to __________.Not learned 874. When a low pressure area is approaching, the weather generally __________.Not learned 875. Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.Not learned 876. Which is a low, uniform layer of cloud resembling fog, but not resting on the ground?Not learned 877. The lunar day is __________.Not learned 878. The lunar day is also known as the __________.Not learned 879. The lunar or tidal day is __________.Not learned 880. Magnets in the binnacles of magnetic compasses are used to reduce which effect?Not learned 881. What do the magnets placed in horizontal trays in the compass binnacle compensate for?Not learned 882. Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. Which are the correctors?Not learned 883. If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?Not learned 884. What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?Not learned 885. Which is TRUE concerning magnetic compass deviation?Not learned 886. The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. Where is this magnetic force the GREATEST?Not learned 887. What is magnetic dip a measurement of?Not learned 888. At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.Not learned 889. Magnetic information on a chart may be __________.Not learned 890. Magnetic variation changes with a change in __________.Not learned 891. Which term is given to magnetism which is present only when the material is under the influence of an external field?Not learned 892. The magnitude of three stars is indicated. Which star is the brightest?Not learned 893. The magnitude of three stars is indicated. Which star is the brightest?Not learned 894. What is the major advantage of high altitude observations?Not learned 895. A major advantage of the NAVTEX system when compared to other systems is that __________.Not learned 896. What is the major advantage of a rhumb line track?Not learned 897. What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?Not learned 898. The major problem with Moon sights is the __________.Not learned 899. What is the major problem with taking high altitude sun observations?Not learned 900. To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted time of the favorable current?Not learned 901. When making landfall at night, how can you determine if a light is a major light or an offshore buoy?Not learned 902. When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. Which term describes this light?Not learned 903. In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. What causes the development of these clouds?Not learned 904. How many characters does the short text messaging feature of the automatic identification system (AIS) allow for?Not learned 905. How many fixed objects are needed to plot a running fix?Not learned 906. How many high waters usually occur each day on the East Coast of the United States?Not learned 907. How many points are there in a compass card?Not learned 908. How many slack tidal currents usually occur each day on the east coast of the United States?Not learned 909. How many targets can an Electronic Plotting Aid (EPA) track at the same time?Not learned 910. Mars is only seen at two phases, one of which __________.Not learned 911. Mars will not be visible __________.Not learned 912. On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?Not learned 913. A marine chronometer should be rewound once every __________.Not learned 914. A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has which error?Not learned 915. The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is __________.Not learned 916. Mariners are FIRST warned of serious defects or important changes to aids to navigation by which means?Not learned 917. Which maritime radio system, consisting of a series of coast stations, transmits coastal warnings?Not learned 918. At the master gyrocompass, the compass card is attached to the __________.Not learned 919. If you are the Master of a towing vessel who’s only working radar no longer functions, what must you do?Not learned 920. What is the maximum difference between mean time and apparent time?Not learned 921. Which term is used to express the maximum distance at which a light may be seen under existing visibility conditions?Not learned 922. Mean high water is the average height of __________.Not learned 923. What is the reference datum mean high water used to measure?Not learned 924. Which measurement uses mean high water as the reference plane?Not learned 925. Which is TRUE of mean high water?Not learned 926. Mean low water is the average height of __________.Not learned 927. Mean lower low water is the reference plane used for which measurements?Not learned 928. The mean sun used to measure time moves __________.Not learned 929. A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?Not learned 930. To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30- mile scale should be used?Not learned 931. The measurement of local time is based on the passage of the Sun over the __________.Not learned 932. Which term is given to the mechanical lifting of air by the upslope slant of the terrain?Not learned 933. On a Mercator chart, 1 nautical mile is equal to __________.Not learned 934. Which type of projection is used to make a Mercator chart?Not learned 935. As a Merchant Marine Officer you are expected to be able to do which of the following?Not learned 936. When a merchant vessel is under the Naval Control of Shipping Organization in wartime, naval authorities may give orders pertaining to __________.Not learned 937. If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?Not learned 938. A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.Not learned 939. At meridian transit, the diagram used by a navigator to illustrate the angles involved is based on the __________.Not learned 940. Which meteorological feature controls the climate of the Gulf of Mexico and the coastal area during late spring and summer?Not learned 941. Miaplacidus is found in what constellation?Not learned 942. In a microbarograph, when should the pen be checked and the inkwell filled?Not learned 943. A microbarograph is a precision instrument that provides a __________.Not learned 944. A mid-channel buoy, if lighted, will show a __________.Not learned 945. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?Not learned 946. On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.Not learned 947. The Milky Way is an example of a __________.Not learned 948. A millibar is a unit of __________.Not learned 949. A millibar is a unit of measure for which of the following?Not learned 950. In modern fathometers, what produces the sonic or ultrasonic sound waves?Not learned 951. In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.Not learned 952. Which is TRUE of Monsoons?Not learned 953. In which month will the equatorial counter current be strongest?Not learned 954. During the month of October the Sun's declination is __________.Not learned 955. When the Moon's declination is maximum north, which of the following will occur?Not learned 956. The Moon is farthest from the Earth at __________.Not learned 957. When the moon is at first quarter or third quarter phase, what type of tides will occur?Not learned 958. When is the Moon nearest to the Earth?Not learned 959. When the moon is new or full, which type of tides occur?Not learned 960. The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?Not learned 961. The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?Not learned 962. The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, where will the Moon be?Not learned 963. A mooring buoy, if lighted, shows which color light?Not learned 964. At morning stars, the last stars that should be observed are those with an azimuth in which quadrant?Not learned 965. The motion of celestial bodies relative to other celestial bodies is known as __________.Not learned 966. A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?Not learned 967. The movement of water away from the shore or downstream is called a(n) __________.Not learned 968. What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage?Not learned 969. The nadir is the point on the celestial sphere that is __________.Not learned 970. Which name is given to the pressure-sensitive element of an aneroid barometer?Not learned 971. Which name is given to the prevailing winds in the band of latitude from approximately 5°N to 30°N?Not learned 972. What is the name of the region of high pressure extending around the Earth at about 35°N latitude?Not learned 973. In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated FLASH will be delivered within __________.Not learned 974. In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated IMMEDIATE will be delivered within __________.Not learned 975. In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated ROUTINE will be delivered within __________.Not learned 976. The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of which area?Not learned 977. The National Oceanic and Atmospheric Administration publishes which item?Not learned 978. The National Weather Service differentiates between small craft, gale, whole gale, and hurricane warnings by the __________.Not learned 979. What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?Not learned 980. In the Nautical Almanac provided, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?Not learned 981. On a nautical chart, what does the inner ring of a compass rose indicate?Not learned 982. Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?Not learned 983. A nautical mile is a distance of approximately how much greater than or less than a statute mile?Not learned 984. Naval authorities would NOT give orders about which of the following, when the vessel is under control of the Naval Control of Shipping Organization?Not learned 985. Naval Control of Shipping (NCS) publications should be __________.Not learned 986. Which Naval Control of Shipping publication should be aboard your vessel?Not learned 987. Which Naval Control of Shipping publication should be aboard your vessel?Not learned 988. Under Naval Control of Shipping who is responsible for routing and diverting ships and convoys?Not learned 989. A NAVAREA warning carries the following number: 1986/87 (11). Which statement is TRUE?Not learned 990. The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.Not learned 991. The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?Not learned 992. The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.Not learned 993. When navigating coastwise and hurricane warnings are received, you should __________.Not learned 994. While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the signal was sounded. What is the distance to the shore?Not learned 995. While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's foghorn 4 1/2 seconds after the signal was sounded. What is the distance to the shore?Not learned 996. When navigating in high latitudes and using a chart based on a Lambert conformal projection, which is TRUE?Not learned 997. You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.Not learned 998. When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?Not learned 999. Which is TRUE when navigating a vessel?Not learned 1000. On navigational aids, what does the light characteristic "Fl(2+1)" mean?Not learned 1001. Which navigational equipment is required to be tested and logged before a towing vessel embarks on a voyage of more than 24 hours?Not learned 1002. Which navigational mark may only be lettered?Not learned 1003. For navigational purposes, each great circle on the Earth has a length of __________.Not learned 1004. In the navigational triangle, the angle at the elevated pole is the __________.Not learned 1005. In the navigational triangle, what is the name of the angle at the elevated pole between the meridian of the observer and the meridian of the celestial body (GP)?Not learned 1006. The navigational triangle uses parts of two systems of coordinates, one of which is the celestial equator system, which is the other system?Not learned 1007. The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?Not learned 1008. The navigator is concerned with three systems of coordinates. Which system is not of major concern?Not learned 1009. A navigator fixing a vessel's position by radar __________.Not learned 1010. When should a navigator rely on the position of floating aids to navigation?Not learned 1011. When do neap tides occur?Not learned 1012. Neap tides occur when the __________.Not learned 1013. When do neap tides occur?Not learned 1014. The needle of an aneroid barometer points to 30.05 on the dial. What does this indicate?Not learned 1015. The new Moon cannot be seen because the Moon is __________.Not learned 1016. NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the conversion table found __________.Not learned 1017. NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of __________.Not learned 1018. Which is a nonadjustable error of the sextant?Not learned 1019. What is a nonadjustable error of the sextant?Not learned 1020. Above-normal tides near the center of a hurricane may be caused by the __________.Not learned 1021. In North America, which direction do the majority of the weather systems move?Not learned 1022. The north equatorial current flows to the __________.Not learned 1023. In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG below would be fitted to this buoy under the IALA Buoyage Systems?Not learned 1024. In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown in illustration D030NG below would be fitted to the buoy?Not learned 1025. In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks in illustration D031NG below would be fitted to this buoy?Not learned 1026. In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown in illustration D031NG below will this buoy be fitted with under the IALA Buoyage system?Not learned 1027. A "Norther" in the Gulf of Mexico is __________.Not learned 1028. In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.Not learned 1029. In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. Which is the best course of action to take?Not learned 1030. In the Northern Hemisphere, when the center of a high-pressure system is due east of your position, you can expect winds from which direction?Not learned 1031. In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________.Not learned 1032. In the Northern Hemisphere, where will the largest waves or swells created by a typhoon or hurricane be located?Not learned 1033. In the Northern Hemisphere how do the major ocean currents tend to flow?Not learned 1034. In the Northern Hemisphere, an observer at point II in illustration D014NG below, should experience a wind shift from what direction?Not learned 1035. In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle. Which statement(s) is/are TRUE?Not learned 1036. In the Northern hemisphere which semicircle of a hurricane is the navigable semicircle?Not learned 1037. In the Northern Hemisphere, which term is given to a wind that shifts counterclockwise?Not learned 1038. You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?Not learned 1039. You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?Not learned 1040. In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?Not learned 1041. In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. The best course of action is to bring the wind on the __________.Not learned 1042. In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle where should you position the wind relative to the vessel?Not learned 1043. Which is TRUE in the Northern Hemisphere when a wind is said to veer?Not learned 1044. In the Northern Hemisphere, what do winds veering sharply to the west or northwest with increasing speed indicate?Not learned 1045. How can Northern right whales can be identified?Not learned 1046. On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?Not learned 1047. What do the numbers on isobars indicate?Not learned 1048. What does the numeral in the center of a wind rose circle on a pilot chart indicate?Not learned 1049. A nun buoy will __________.Not learned 1050. If you observe a buoy off station which action should you take?Not learned 1051. If you observe a rapid fall of barometric pressure, which action should you take?Not learned 1052. If an observer is at 35° N latitude, his zenith is __________.Not learned 1053. If an observer in the Northern Hemisphere faces the surface wind, where is the center of low pressure located?Not learned 1054. You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?Not learned 1055. When observing a rapid rise in barometric pressure, what may you expect?Not learned 1056. How is an occluded front represented on a weather map?Not learned 1057. Which is TRUE of an occulting light?Not learned 1058. What occurs when rising air cools to the dew point?Not learned 1059. Which term defines the ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth?Not learned 1060. Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?Not learned 1061. Ocean currents are well defined and __________.Not learned 1062. Ocean swells originating from a typhoon can move ahead of it at speeds near __________.Not learned 1063. How often are the time signals broadcast by WWV and WWVH transmitted?Not learned 1064. One point of a compass is equal to how many degrees?Not learned 1065. During one synodic rotation, a body makes one complete turn relative to the __________.Not learned 1066. When operated over a muddy bottom, a fathometer may indicate which of the following?Not learned 1067. On what does the operation of an aneroid barometer depend?Not learned 1068. Opposition occurs when __________.Not learned 1069. What option does an Electronic Plotting Aid (EPA) not have?Not learned 1070. An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?Not learned 1071. An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?Not learned 1072. An orange and white buoy marking a danger area will have what symbol on it?Not learned 1073. An orange and white buoy with a rectangle on it displays what information?Not learned 1074. In what order should the following sextant adjustments be made? I. Make telescope parallel to frame of sextant. II. Set horizon glass perpendicular to frame of sextant. III. Make index mirror and horizon glass parallel when index arm is set at zero. IV. Set index mirror perpendicular to frame of sextant.Not learned 1075. In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.Not learned 1076. In order to insure that the racon signal is visible on your 3 cm radar, the __________.Not learned 1077. How can you remove index error from a sextant?Not learned 1078. In order to remove side error from a sextant, which adjustment can be made?Not learned 1079. In order for a star to be used for a sight at lower transit, which must be TRUE of the star?Not learned 1080. You are outbound in a buoyed channel on course 015°T. You sight a white light showing a MorseNot learned 1081. You are outbound in a channel marked by a range astern. The range line is 309°T. You are steering 127°T and have the range in sight as shown in illustration D047NG below. What action should you take?Not learned 1082. When outbound from a U.S. port, what does a buoy displaying a flashing red light indicate?Not learned 1083. At the outbreak of war your ship is caught in an enemy port. Which statement is FALSE?Not learned 1084. When the owner or Master inspects his/her towing vessel before embarking on a voyage of more than 24 hours, he/she must check all terminal gear EXCEPT __________.Not learned 1085. The owner or Master of a towing vessel must ensure that each person that directs and controls the movement of the vessel knows all of the following EXCEPT _________.Not learned 1086. The owner or Master of a towing vessel that is operating within a Vessel Traffic Service (VTS) area must report specific information to the service. Which of the following choices is not required to be reported?Not learned 1087. The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vessel can accomplish all of the following EXCEPT _________.Not learned 1088. The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vessel can accurately fix the vessel's position using all of the following EXCEPT _________.Not learned 1089. The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place. When are these actions required to be logged?Not learned 1090. The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged __________.Not learned 1091. A parallax correction is NOT applied to observations of which celestial bodies?Not learned 1092. The parallel of latitude at 23° 27' S is the __________.Not learned 1093. The parallel of latitude at 66° 33' N is the __________.Not learned 1094. Which part of a sextant is mounted directly over the pivot of the index arm?Not learned 1095. In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.Not learned 1096. The passing of a low pressure system can be determined by periodically checking the __________.Not learned 1097. The path of a celestial body during its daily apparent revolution around the Earth is called its __________.Not learned 1098. Which term defines the paths of intended travel between three or more points?Not learned 1099. The path that the Sun appears to take among the stars is the __________.Not learned 1100. The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is known by which term?Not learned 1101. When is the peak of the hurricane season in the western North Pacific?Not learned 1102. Perihelion is the point where the Sun __________.Not learned 1103. The period of the Earth's revolution from perihelion to perihelion is the __________.Not learned 1104. Which refers to the period at high or low tide during which there is no change in the height of the water?Not learned 1105. The period of a lighted aid to navigation refers to the __________.Not learned 1106. The period of revolution of the Moon is __________.Not learned 1107. The period of rotation of the Moon on its axis is __________.Not learned 1108. Permanent magnetism is caused by __________.Not learned 1109. The permanent magnetism of a vessel may change in polarity due to __________.Not learned 1110. The permanent magnetism of a vessel may change in strength due to __________.Not learned 1111. The permanent magnetism of a vessel may change in strength due to __________.Not learned 1112. A phase correction is applied to observations of __________.Not learned 1113. The phase correction should be applied to sights of Venus and Mars __________.Not learned 1114. A phase correction may be applicable to correct the sextant altitude correction of __________.Not learned 1115. A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.Not learned 1116. Which piece of navigational safety equipment is NOT required on towing vessels over 12 meters in length, provided that the vessel remains within the navigable waters of the U.S.?Not learned 1117. A pilot chart does NOT contain information about which item?Not learned 1118. Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?Not learned 1119. Plain language is usually used on marine weather __________.Not learned 1120. A plane that cuts the Earth's surface at any angle and passes through the center will always form __________.Not learned 1121. A plane that cuts the Earth's surface and passes through the poles will always form __________.Not learned 1122. A plane perpendicular to the polar axis will never form what line on the Earth's surface?Not learned 1123. The planet Venus can be observed in the morning before sunrise if it is well to the __________.Not learned 1124. Planetary aberration is due, in part, to __________.Not learned 1125. You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?Not learned 1126. You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the dangers to navigation in the English Channel?Not learned 1127. You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?Not learned 1128. You should plot your dead reckoning position __________.Not learned 1129. You should plot a dead reckoning position after every __________.Not learned 1130. You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.Not learned 1131. You plot a fix using three lines of position and find they intersect in a triangle. You should plot the position of the vessel __________.Not learned 1132. When plotting a circle of equal altitude for a high altitude sight, the radius of the circle is determined by which formula?Not learned 1133. You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?Not learned 1134. You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?Not learned 1135. The point on the celestial sphere that is directly over the observer is known by which term?Not learned 1136. The points on the earth's surface where the magnetic dip is 90° are __________.Not learned 1137. Which term is given to the points where the Sun is at 0° declination?Not learned 1138. The point where the Sun is at maximum declination north or south is __________.Not learned 1139. Which term is used to define the point where the vertical rise or fall of tide has stopped?Not learned 1140. Polaris is part of what constellation?Not learned 1141. On the pole side of the high-pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east. What is the name of these winds?Not learned 1142. On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the __________.Not learned 1143. The population of northern right whales, an endangered species, numbers approximately __________.Not learned 1144. A position on the Earth has a longitude of 74°10'E. What would its celestial counterpart?Not learned 1145. Which position includes the effects of wind and current?Not learned 1146. A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.Not learned 1147. Which term is used for a position obtained by applying ONLY your vessel's course and speed to a known position?Not learned 1148. Which is the term used for a position obtained by taking lines of position from one object at different times and advancing them to a common time?Not learned 1149. A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.Not learned 1150. When possible, a DR plot should always be started from where?Not learned 1151. The precession of the equinoxes occurs in which direction?Not learned 1152. To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?Not learned 1153. How do preferred channel buoys indicate the preferred channel to transit?Not learned 1154. A preferred-channel buoy may be __________.Not learned 1155. While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take?Not learned 1156. You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________.Not learned 1157. The presence of stratus clouds and a dying wind will usually result in __________.Not learned 1158. Your present weather is sunny with a steady barometer. A low swell approaches your vessel from the south with crests passing at relatively long periods of about four per minute. What does this usually indicate?Not learned 1159. The pressure gradient between the horse latitudes and doldrums runs __________.Not learned 1160. Pressure gradient is a measure of __________.Not learned 1161. When do the prevailing westerlies of the Southern Hemisphere blow 17-27 knots?Not learned 1162. Where are the prevailing westerlies of the Southern Hemisphere located?Not learned 1163. Prevailing winds between 30°N and 60°N latitude are from which direction?Not learned 1164. What is the primary source of the earth's weather?Not learned 1165. The primary use of apparent time in marine navigation is to __________.Not learned 1166. The prime vertical is the great circle on the celestial sphere that passes through the __________.Not learned 1167. The prime vertical is the reference point from which the angle of which type of observation is measured?Not learned 1168. The principal advantage of NAVTEX radio warnings is that __________.Not learned 1169. The principal vertical circle is that great circle on the celestial sphere that passes through which of the following?Not learned 1170. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?Not learned 1171. The probability of a sudden wind may be foretold by __________.Not learned 1172. While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown in illustration D020NG below. Your course is 039°T, and the buoy bears 053°T. What action should you take?Not learned 1173. While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown in illustration D021NG below, bearing 053°T. What action should you take?Not learned 1174. You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) __________.Not learned 1175. You are proceeding under NCS (Naval Control of Shipping) when it becomes necessary to send a distress message. Which precedence would you assign this message?Not learned 1176. You are proceeding under NCS (Naval Control of Shipping) and wish to send a message concerning an initial enemy contact. Which precedence would you assign this message?Not learned 1177. You are proceeding under NCS (Naval Control of Shipping) when you wish to send a message concerning your ships diversion. Which precedence would you assign this message?Not learned 1178. You are proceeding under NCS (Naval Control of Shipping) and wish to send a message by rapid transmission which does not require a higher precedence. Which precedence would you assign this message?Not learned 1179. You are proceeding under NCS (Naval Control of Shipping) and wish to send a message warning of a hurricane. Which precedence would you assign this message?Not learned 1180. "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding ________.Not learned 1181. The process by which the temperature and/or moisture characteristics of an air mass changes is called __________.Not learned 1182. A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. What can be determined by comparing these two temperature readings with a set of tables?Not learned 1183. Which publication is NOT carried on board U.S. merchant vessels operating under Naval Control of Shipping?Not learned 1184. Which publication should you check for complete information on Puget Sound weather conditions?Not learned 1185. What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions?Not learned 1186. Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?Not learned 1187. Which publication contains information on Naval Cooperation and Guidance for Shipping (NCAGS) in time of emergency or war?Not learned 1188. Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay?Not learned 1189. What publication contains information about the port facilities in Cadiz, Spain?Not learned 1190. Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?Not learned 1191. What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?Not learned 1192. Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States?Not learned 1193. Which publication(s) must a towing vessel of 12 meters or more in length carry when operating on US waters other than the Western Rivers?Not learned 1194. Which publication requires infrequent corrections?Not learned 1195. Which publication would describe the explosive anchorages in the ports on the east coast of the United States?Not learned 1196. Which publication would NOT be used on a voyage from Houston to New York?Not learned 1197. What is published by the U.S. Coast Guard?Not learned 1198. What is the purpose of the "reference hand" on an aneroid barometer?Not learned 1199. The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.Not learned 1200. Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?Not learned 1201. Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1° E. Which true bearing should be plotted on the chart?Not learned 1202. Which radar control reduces weak echoes out to a limited distance from the ship?Not learned 1203. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 1204. Which radar control is used to reduce sea return at close ranges?Not learned 1205. Which term is given to a radar display which is oriented, so that north is always at the top of the screen?Not learned 1206. Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?Not learned 1207. Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.Not learned 1208. Radar makes the most accurate determination of the __________.Not learned 1209. A radar range to a small, charted object such as a light will provide a line of position in which form?Not learned 1210. You are radar scanning for a buoy fitted with a racon. In illustration D017NG below, which radar screen represents the presentation you should expect on the PPI?Not learned 1211. Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope?Not learned 1212. Which is TRUE of Radiation fog?Not learned 1213. The radius of a circle of equal altitude of a body is equal to the __________.Not learned 1214. The radius of a circle of equal altitude for a body equals the body's __________.Not learned 1215. A rapid rise or fall of the barometer indicates __________.Not learned 1216. Which is TRUE of Raster-scan chart data?Not learned 1217. What is the reaction of a gyrocompass to an applied force known as?Not learned 1218. In reading a weather map, what do closely spaced pressure gradient lines indicate?Not learned 1219. The recording fathometer produces a graphic record of the __________.Not learned 1220. When recording the wind direction in the weather log, which information would you report?Not learned 1221. Recurvature of a hurricane's track usually results in the forward speed __________.Not learned 1222. What do red sectors of navigation lights warn mariners of?Not learned 1223. Which is the reference datum used in determining the heights of land features on most charts?Not learned 1224. The reference point for determination of GMT is the passage of the mean sun over what line?Not learned 1225. Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is __________.Not learned 1226. The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and which atmospheric pressure?Not learned 1227. With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.Not learned 1228. Which is the region containing 3/4 of the mass of the atmosphere and to which are confined such phenomena as clouds, storms, precipitation and changing weather conditions?Not learned 1229. In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by which buoy?Not learned 1230. IN REGION A of the IALA Buoyage System, when entering from seaward, how would the starboard side of a channel be marked?Not learned 1231. In both regions of the IALA buoyage system, which topmark shown in illustration D022NG below is used on a special mark?Not learned 1232. In regions near the poles, how are the winds generally described?Not learned 1233. A relative bearing is always measured from __________.Not learned 1234. What is the relative bearing of an object on the port beam?Not learned 1235. What is the relative bearing of an object broad on the port bow?Not learned 1236. What is the relative bearing of an object broad on the port quarter?Not learned 1237. What is the relative bearing of an object on the starboard beam?Not learned 1238. What is the relative bearing of an object broad on the starboard bow?Not learned 1239. What is the relative bearing of an object broad on the starboard quarter?Not learned 1240. What is the relative bearing of an object dead astern?Not learned 1241. What is the relative bearing of an object sighted dead ahead?Not learned 1242. Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.Not learned 1243. In the relatively calm area near the hurricane center, the seas are __________.Not learned 1244. You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?Not learned 1245. When reporting wind direction, how should you give the direction?Not learned 1246. You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.Not learned 1247. With respect to automatic identification systems (AIS) which of the following information is broadcast every one to ten seconds?Not learned 1248. With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?Not learned 1249. With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?Not learned 1250. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 1251. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 1252. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 1253. With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.Not learned 1254. With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.Not learned 1255. With respect to a reversing current, when does slack water occur?Not learned 1256. With respect to the vernal equinox, what is the length of the year?Not learned 1257. What results when warm moist air blows over a colder surface and is cooled below its dew point?Not learned 1258. Retrograde motion is the __________.Not learned 1259. When is a revised print of a chart made?Not learned 1260. The revision date of a chart is printed on which area of the chart?Not learned 1261. Revolution is the __________.Not learned 1262. When is the rhumb line distance the same as the great circle distance?Not learned 1263. If the right ascension of a body is 9 hours, it also __________.Not learned 1264. Right ascension is primarily used by the navigator for __________.Not learned 1265. The rise and fall of the ocean's surface due to a distant storm is known as __________.Not learned 1266. In some river mouths and estuaries, the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream. Which term describes this occurrence?Not learned 1267. In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.Not learned 1268. A rotary current sets through all directions of the compass. How much time does it take to complete one of these cycles, in a locale off the East coast of the U.S.?Not learned 1269. On which route is a towing vessel over 39.4 feet in length NOT required to carry an echo-sounding device?Not learned 1270. You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?Not learned 1271. You are running parallel to the coast and take a running fix using bearings of the same object. Which is TRUE if you are making less speed than used for the running fix, in relation to the position indicated by the fix?Not learned 1272. Safe water buoys may show ONLY which type of light?Not learned 1273. A safe water mark may be __________.Not learned 1274. How is a safe water mark, that can be passed close aboard on either side, painted and lighted?Not learned 1275. A sailing chart could have which scale?Not learned 1276. The Sailing Directions contain information on __________.Not learned 1277. The Sailing Directions (Enroute) contain which information?Not learned 1278. The Sailing Directions (Enroute) contain information on all of the following EXCEPT which topic of information?Not learned 1279. The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT which item?Not learned 1280. The Sailing Directions are published in the Enroute format and which other format?Not learned 1281. If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?Not learned 1282. If you were sailing in the North Pacific and were interested in the ice and iceberg limits, where could you find this information?Not learned 1283. You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on it. Which of the following is TRUE?Not learned 1284. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which statement is TRUE?Not learned 1285. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow triangle painted on it. Which statement is TRUE?Not learned 1286. In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.Not learned 1287. Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.Not learned 1288. The scale on a chart is given as 1:5,000,000. What does this ratio indicate?Not learned 1289. Which scale is used to estimate wind speed by observing sea conditions?Not learned 1290. Which is TRUE of a sea breeze?Not learned 1291. A semidiameter correction is applied to observations of __________.Not learned 1292. A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.Not learned 1293. The set of the current is the __________.Not learned 1294. Set of the current is __________.Not learned 1295. The set of the North Equatorial Countercurrent is generally in which direction?Not learned 1296. There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?Not learned 1297. If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?Not learned 1298. Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.Not learned 1299. What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?Not learned 1300. Which of these sextant errors is nonadjustable?Not learned 1301. A sextant having an index error that is "off the arc" has a __________.Not learned 1302. In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave. This occurrence describes which term?Not learned 1303. A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. What are the direction and speed of the true wind?Not learned 1304. A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?Not learned 1305. Your ship is in a neutral port when full Naval Control of Shipping is established. You may expect to be boarded and instructed by a(n) __________.Not learned 1306. Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?Not learned 1307. If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________.Not learned 1308. Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?Not learned 1309. Your ship is returning to New Orleans from a foreign voyage and carrying a bulk cargo of anhydrous ammonia. Under what conditions must you must notify the Captain of the Port, New Orleans?Not learned 1310. What does the shoreline on charts generally represent?Not learned 1311. The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.Not learned 1312. Which is NOT a side of the celestial navigational triangle?Not learned 1313. What is NOT a side of the navigational triangle used in sight reduction?Not learned 1314. A sidereal day is approximately how much shorter than a solar day?Not learned 1315. The sidereal day begins __________.Not learned 1316. The sidereal day begins when the __________.Not learned 1317. A sidereal day is shorter than a solar day. What is the reason for this difference?Not learned 1318. Sidereal hour angle is always __________.Not learned 1319. Sidereal time is NOT used __________.Not learned 1320. Sidereal time is used by navigators when __________.Not learned 1321. You sight a buoy fitted with a double-sphere topmark. If sighted at night, what color and light sequence would you expect to see?Not learned 1322. You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions?Not learned 1323. A sign of thunderstorm development is a cumulus cloud __________.Not learned 1324. How will the signal from a ramark show on the PPI?Not learned 1325. A single barometric pressure reading of 28.60 indicates __________.Not learned 1326. A single line of position combined with a dead-reckoning position results in a(n) __________.Not learned 1327. A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.Not learned 1328. When slanted letters are used to spell the name of a charted object you know the __________.Not learned 1329. A sling psychrometer is a(n) __________.Not learned 1330. What is a sling psychrometer used to measure?Not learned 1331. What does a slow, gradual fall of the barometer indicate?Not learned 1332. What does a slow rise in the barometric pressure forecast?Not learned 1333. Which term defines the small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body?Not learned 1334. When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.Not learned 1335. Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________.Not learned 1336. What do the soft iron spheres mounted on arms on the binnacle compensate for?Not learned 1337. What do solid green arrows on the main body of a pilot chart indicate?Not learned 1338. Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?Not learned 1339. If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is picked up, what depth of water is indicated?Not learned 1340. In which source could you find the number of a chart for a certain geographic area?Not learned 1341. As the South Equatorial Current approaches the east coast of Africa, it divides with the main part flowing south to form which current?Not learned 1342. The southeast trade winds actually blow in which direction?Not learned 1343. In the Southern Hemisphere the wind circulation in a high pressure system rotates in which direction?Not learned 1344. In the Southern Hemisphere winds in a low pressure system rotate in which direction?Not learned 1345. "Space motion" is the __________.Not learned 1346. A special mark (yellow buoy), if lighted, may exhibit which light rhythm?Not learned 1347. A special purpose buoy shall be __________.Not learned 1348. What is a "Special Warning"?Not learned 1349. The speed of an ocean current is dependent on __________.Not learned 1350. Which term is used to describe the speed at which an ocean wave system advances?Not learned 1351. The speed of sound through ocean water is nearly always __________.Not learned 1352. The speed of sound in water is approximately __________.Not learned 1353. A spherical buoy may be __________.Not learned 1354. The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?Not learned 1355. The spinning of a celestial body about its axis is known as __________.Not learned 1356. Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?Not learned 1357. When do Spring tides occur?Not learned 1358. Spring tides occur __________.Not learned 1359. Which is TRUE concerning the occurrence of Spring tides?Not learned 1360. Spring tides are tides that __________.Not learned 1361. Squall lines with an almost unbroken line of threatening dark clouds and sharp changes in wind direction, generally precede which front?Not learned 1362. "Stand" of the tide is that time when __________.Not learned 1363. What is the standard atmospheric pressure as measured in inches of mercury?Not learned 1364. What is the standard atmospheric pressure in millibars?Not learned 1365. How does the standard magnetic compass heading differ from the true heading?Not learned 1366. Which is the standard meridian for the time zone +1?Not learned 1367. What is the standard time meridian for zone description -1?Not learned 1368. What is the standard time meridian for description +12?Not learned 1369. The Star Lists in the Nautical Almanac are based on which of the following magnitudes?Not learned 1370. A star is observed at lower transit. The line of position derived from this sight is __________.Not learned 1371. A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.Not learned 1372. Which statement concerning the chartlet in illustration D010NG below is true? (Soundings and heights are in meters)Not learned 1373. Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters)Not learned 1374. Which statement concerning current is TRUE?Not learned 1375. Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?Not learned 1376. Which statement concerning GPS is TRUE?Not learned 1377. Which statement describes the prevailing wind direction in mid-winter in the Gulf Coast area?Not learned 1378. Which statement about an estimated position is TRUE?Not learned 1379. Which statement is FALSE concerning the dangerous semicircle of a hurricane?Not learned 1380. Which statement about the Flinders bar of the magnetic compass is CORRECT?Not learned 1381. Which statement about a gnomonic chart is correct?Not learned 1382. Which statement about gyrocompass error is TRUE?Not learned 1383. Which statement about the gyrocompass is FALSE?Not learned 1384. Which statement about Naval Control of Shipping in wartime is TRUE?Not learned 1385. Which statement about radio navigational warnings is TRUE?Not learned 1386. Which statement is TRUE when comparing cold and warm fronts?Not learned 1387. Which statement is TRUE concerning apogean tides?Not learned 1388. Which statement is TRUE concerning the current of the Gulf Stream?Not learned 1389. Which statement is TRUE concerning equatorial tides?Not learned 1390. Which statement is TRUE concerning a Mercator projection?Not learned 1391. Which statement is TRUE for an unlighted, red and green, horizontally-banded buoy with the topmost band red?Not learned 1392. Which is TRUE concerning static crashes on your AM radio?Not learned 1393. The steady current circling the globe at about 60° S is the __________.Not learned 1394. Steady precipitation is typical of __________.Not learned 1395. Steam fog will occur when which conditions exists?Not learned 1396. You sight an isolated danger buoy with a white flashing light showing a group of two flashes. The buoy indicates you should take which action?Not learned 1397. While steaming on course 280°T, you sight a buoy showing a very quick flashing (VQ) white light well to port. Maintaining course, you sight another buoy showing a quick flashing (Q) white light. How should you pass?Not learned 1398. You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, where does the center of low pressure lie?Not learned 1399. While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG below. How would you pass this buoy?Not learned 1400. You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indicates that an earthquake has occurred in the Aleutians and has generated a tsunami that is predicted to hit Hawaii. What action is necessary for the ship's safety?Not learned 1401. You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.Not learned 1402. You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green light. How should you pass this buoy?Not learned 1403. You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, where does the center of low pressure lie?Not learned 1404. You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?Not learned 1405. What does a steep barometric gradient indicate?Not learned 1406. The steepness of a cold front depends on __________.Not learned 1407. You are steering 143°T, and a light is picked up dead ahead at a distance of 18.2 miles at 2006. You change course to pass the light 5.5 miles off abeam to port. If you are making 14.5 knots, what is your ETA at a position 5.5 miles off the light?Not learned 1408. While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?Not learned 1409. While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?Not learned 1410. When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should take which action?Not learned 1411. You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?Not learned 1412. A storm's track is characterized by all of the following except __________.Not learned 1413. Stormy weather is usually associated with regions of __________.Not learned 1414. All straight lines represent great circle tracks on a chart based on which projection?Not learned 1415. Which wind is a strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months?Not learned 1416. The strongest winds and heaviest rains in a hurricane are found in the __________Not learned 1417. The summer solstice is the point where the Sun is at __________.Not learned 1418. The Sun's center is coincident with the principal vertical circle when __________.Not learned 1419. The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.Not learned 1420. The Sun is closest to the Earth in what month?Not learned 1421. The Sun at a maximum declination north would be approximately at __________Not learned 1422. Other than the Sun and Moon, the brightest object in the sky is __________.Not learned 1423. If the Sun's observed altitude is 47? 50', the zenith distance is __________.Not learned 1424. If the Sun's observed altitude is 54? 30', what is the zenith distance?Not learned 1425. Superior conjunction occurs when __________.Not learned 1426. "Surface circulation" is another term for __________.Not learned 1427. The survey information upon which a chart is based is found at which location?Not learned 1428. A survey (special purpose mark) buoy __________.Not learned 1429. Swells that have outrun the storm are produced in the __________.Not learned 1430. Swell is the rise and fall of the ocean's surface due to __________.Not learned 1431. A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in height of tide at the two ends of the passage, is called a __________.Not learned 1432. A sylphon cell is a part of which instrument?Not learned 1433. The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?Not learned 1434. The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess?Not learned 1435. Which symbol represents a 10-fathom curve?Not learned 1436. Which symbol represents a 2-fathom curve?Not learned 1437. Which of the symbols shown in illustration D018NG below represents an occluded front?Not learned 1438. Which of the symbols shown in illustration D018NG below represents a warm front?Not learned 1439. What does the symbol shown in illustration D033NG below indicate on a chart?Not learned 1440. What is a system of reservoirs and connecting tubes in a gyro compass called?Not learned 1441. Which table is NOT found in the U.S. Coast Pilots?Not learned 1442. You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?Not learned 1443. You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?Not learned 1444. You take a bearing of 086° of a lighthouse. Which bearing of another object would give the best fix?Not learned 1445. You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?Not learned 1446. You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?Not learned 1447. You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?Not learned 1448. You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?Not learned 1449. You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?Not learned 1450. You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?Not learned 1451. You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?Not learned 1452. You take bearings of 313° T and 076° T on two objects. Which bearing of a third object will give the best fix?Not learned 1453. You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?Not learned 1454. You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?Not learned 1455. When taking an amplitude, the Sun's center should be observed on the visible horizon when __________.Not learned 1456. You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.Not learned 1457. When taking stars, those bodies to the east and west will __________.Not learned 1458. While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log as __________.Not learned 1459. While taking weather observations, you determine that the wind is coming from the west. In the weather log, how would you record the wind direction?Not learned 1460. Which is TRUE as the temperature of an air mass decreases?Not learned 1461. Which is TRUE as the temperature of the air reaches the dew point?Not learned 1462. Which term describes the temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur?Not learned 1463. How does the temperature change with the passage of an occluded front?Not learned 1464. Which is TRUE as the temperature for a given mass of air increases?Not learned 1465. Temperature and moisture characteristics are modified in a warm or cold air mass due to which factor?Not learned 1466. The term "flood current" refers to that time when the water __________.Not learned 1467. Which term is given to a mature hurricane that has passed over colder water or land and loses its tropical characteristics?Not learned 1468. Which term is given to a tornado that moves out over the water from land?Not learned 1469. Which term is given to the vertical angle between the horizontal and the magnetic line of force?Not learned 1470. Which term refers to the direction a current is flowing?Not learned 1471. What does the term "tide" refer to?Not learned 1472. Which term is used to describe a generally circular low-pressure area?Not learned 1473. Which term is used to describe the time interval between successive wave crests?Not learned 1474. Which term is used to describe the wind speed and direction observed from a moving vessel?Not learned 1475. The test of a towing vessel's steering gear control system includes each item EXCEPT __________.Not learned 1476. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 1477. Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.Not learned 1478. Which is TRUE of the tides in Boston Harbor?Not learned 1479. When the time is based on the movement of the visible Sun along the ecliptic the time is known as __________.Not learned 1480. A time diagram is a diagram of the celestial sphere as observed from above which location?Not learned 1481. A time diagram is a diagram on the plane of the __________.Not learned 1482. The time interval between successive wave crests is called the __________.Not learned 1483. The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.Not learned 1484. Which time meridian is used when computing the velocity of the current for Pensacola Bay, Florida?Not learned 1485. Which time meridian is used for tide computations in New York Harbor?Not learned 1486. The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.Not learned 1487. Time signals broadcast by WWV and WWVH are transmitted __________.Not learned 1488. In time of war Naval Control of Shipping Authorities may give orders concerning the __________.Not learned 1489. Which topmark shown in illustration D023NG below identifies an isolated danger?Not learned 1490. When a tornado moves over the water from land it is called a __________.Not learned 1491. The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are given which term?Not learned 1492. Towing vessels of more than 39.4 feet in length must carry charts or maps __________.Not learned 1493. Which towing vessel(s) is/are exempt from carrying radar?Not learned 1494. A towing vessel is NOT required to be fitted with radar if it is __________.Not learned 1495. A towing vessel is NOT required to be fitted with radar if it is __________.Not learned 1496. On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to voluntary Naval Cooperation and Guidance for Shipping (NCAGS). Where can further information be located?Not learned 1497. Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?Not learned 1498. Tropical cyclones do not form within 5° of the Equator because __________.Not learned 1499. Tropical cyclones normally form within which of the following belts of latitude?Not learned 1500. In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is located in which position?Not learned 1501. Tropical storms and hurricanes are most likely to form in the Southern hemisphere during which months?Not learned 1502. A tropical storm is a tropical cyclone that generates winds of which speed?Not learned 1503. A tropical wave is usually preceded by __________.Not learned 1504. The tropical year differs from which year by 20 minutes?Not learned 1505. Which is TRUE of an aneroid barometer?Not learned 1506. Which is TRUE of an aneroid barometer on a vessel?Not learned 1507. A true bearing of a charted object, when plotted on a chart, will establish a __________.Not learned 1508. Which is TRUE concern the horizon glass of a sextant?Not learned 1509. What is NOT true concerning color sectors of lights?Not learned 1510. Which is TRUE concerning Hot air?Not learned 1511. What is TRUE concerning new editions of Light Lists?Not learned 1512. Which is TRUE concerning Wind velocity?Not learned 1513. What is true about a front?Not learned 1514. True heading differs from magnetic heading by __________.Not learned 1515. What is TRUE of the history display of a target's past positions on an ARPA?Not learned 1516. Which is TRUE for a sextant having an index error that is "on the arc"?Not learned 1517. Which is TRUE when using the radar for navigation?Not learned 1518. Which is TRUE of the velocity of the current in large coastal harbors?Not learned 1519. Which is TRUE of a vertically-striped buoy?Not learned 1520. When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?Not learned 1521. A tsunami is caused by a(n) __________.Not learned 1522. Which are the two most effective generating forces of surface ocean currents?Not learned 1523. Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. How are the buoys of one cardinal system identified from the other system?Not learned 1524. Two well-developed high-pressure areas may be separated by which item?Not learned 1525. Two well-developed low pressure areas may be separated by a __________.Not learned 1526. Which type of cloud is among the most dependable for giving an indication of an approaching weather system?Not learned 1527. What type of clouds are associated with a cold front?Not learned 1528. Which type of cloud is the classic "thunderhead"?Not learned 1529. Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?Not learned 1530. Which type of cloud formation should be of immediate concern to small craft operators?Not learned 1531. From which type of cloud can a tornado or waterspout develop?Not learned 1532. The type of current which will have the greatest effect on the course made good for your vessel is __________.Not learned 1533. Which type of fog occurs on clear nights with very light breezes and forms when the earth cools rapidly?Not learned 1534. Which type of front forms when a cold front overtakes and forces a warm front upwards?Not learned 1535. Which type of frontal passage is associated with a relatively narrow band of precipitation?Not learned 1536. Which type of GPS receiver has at least four channels to process information from several satellites simultaneously?Not learned 1537. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?Not learned 1538. Which type of precipitation is a product of the violent convection in thunderstorms?Not learned 1539. Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?Not learned 1540. The typical operating range of automatic identification systems (AIS) at sea is nominally __________.Not learned 1541. What is typical of warm front weather conditions?Not learned 1542. What U.S. agency is responsible for NAVAREA warnings?Not learned 1543. Under the U.S. Aids to Navigation System, which category is a yellow buoy?Not learned 1544. In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic?Not learned 1545. In the U.S. Aids to Navigation System, what do red and green horizontally-banded buoys mark?Not learned 1546. Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics?Not learned 1547. On U.S. charts, how you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged?Not learned 1548. The U.S. Coast Guard publishes __________.Not learned 1549. You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.Not learned 1550. While underway, automatic identification systems (AIS) broadcast all of the following information every 1 to 10 seconds EXCEPT the __________.Not learned 1551. You are underway on course 050° T and your maximum speed is 10 knots. The eye of a hurricane bears 100° T, 90 miles from your position. The hurricane is moving towards 285° T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?Not learned 1552. You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1553. You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. What course should you steer at 11 knots to have the maximum CPA?Not learned 1554. You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1555. You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?Not learned 1556. You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1557. You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?Not learned 1558. You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1559. You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?Not learned 1560. You are underway on course 050? T and your maximum speed is 13 knots. The eye of a hurricane bears 100? T, 120 miles from your position. The hurricane is moving towards 275? T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1561. You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?Not learned 1562. You are underway on course 120°T and can make 12 knots. The eye of a hurricane bears 150°T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA?Not learned 1563. You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?Not learned 1564. You are underway on course 127°T. You sight a buoy with the topmarks shown in illustration D025NG below, bearing two points on the starboard bow. Which action must be taken?Not learned 1565. You are underway on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. What should you do to ensure that your vessel remains in the best navigable water?Not learned 1566. You are underway on course 328°T when you sight a buoy broad on your port bow. Which would indicate that you are in the best navigable water?Not learned 1567. You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy has which of the following characteristics?Not learned 1568. You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. What does this indicate?Not learned 1569. While underway, a vessel over 100,000 gross tons with an automatic identification systems (AIS) is expected to broadcast all of the following information every 1 to 10 seconds EXCEPT __________.Not learned 1570. You are underway in a vessel with a draft of 6.0 feet. You are in an area where the charted depth of the water is 4 fathoms. You would expect the depth of water beneath your keel to be approximately __________.Not learned 1571. You are underway in a vessel with a draft of 7.0 feet (2.1 meters). The charted depth for your position is 9 fathoms. You compute the height of tide to be +3.0 feet (0.9 meters). You determine the depth of the water beneath your keel to be __________.Not learned 1572. Under the Uniform State Waterway Marking System how is a mooring buoy painted?Not learned 1573. In the United States, who broadcasts the short-range radio navigational warnings?Not learned 1574. In United States waters, a buoy having red and white vertical stripes if lighted, it will have which light characteristic?Not learned 1575. Universal time (UTI) is another name for __________.Not learned 1576. It is unlawful to approach within how many yards of a Northern Right Whale?Not learned 1577. Upper limb observations of the Moon are used more frequently than those of the Sun because of the location of the Moon in the sky and the __________.Not learned 1578. At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.Not learned 1579. The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in which LONG?Not learned 1580. When using an ARPA, what should you consider in order to evaluate the information displayed?Not learned 1581. When using the ARPA in heavy rain, which action should you take?Not learned 1582. When using a buoy as an aid to navigation which of the following should be considered?Not learned 1583. When using an echo sounder in deep water, it is NOT unusual to encounter which situation?Not learned 1584. When using GPS, how many theoretical position lines are required for a two-dimensional fix?Not learned 1585. When using GPS without Selective Availability, what can you expect your horizontal accuracy to be of the unit?Not learned 1586. When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?Not learned 1587. When using a Lambert conformal chart in high latitudes, which reference is used to measure angles such as bearings or courses?Not learned 1588. When using a mechanical (windup type) marine chronometer, how often should it be reset?Not learned 1589. You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0°. If bearings are measured in relation to the flash, what type of bearings are produced?Not learned 1590. When using a radar in an unstabilized mode, fixes are determined most easily from __________.Not learned 1591. When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom?Not learned 1592. Using the surface analysis in illustration D049NG below, what change in the wind direction could be expected at position "D" if the low were moving northeasterly?Not learned 1593. Using the surface analysis in illustration D049NG below, what weather conditions would you expect to find at position A?Not learned 1594. Using the surface analysis in illustration D049NG below, which wind speeds are reported at position A?Not learned 1595. Using the surface analysis in illustration D049NG below, what wind speed is reported in position C?Not learned 1596. The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.Not learned 1597. When utilizing a Pacific Coast chart, which is the reference plane of soundings?Not learned 1598. The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the _________.Not learned 1599. How can the value of a minor index error of a sextant be determined?Not learned 1600. The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.Not learned 1601. A variable star is one that __________.Not learned 1602. Variation is the angular measurement between which two points?Not learned 1603. Variation is a compass error that you __________.Not learned 1604. Variation is not constant; it is different with every change in __________.Not learned 1605. How is variation indicated on a small-scale nautical chart?Not learned 1606. What will a veering wind do?Not learned 1607. The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the _________.Not learned 1608. The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.Not learned 1609. The velocity of a rotary tidal current will be decreased when the Moon is at which phase?Not learned 1610. The velocity of a rotary tidal current will increase when the Moon is at which phase?Not learned 1611. The velocity of the wind, its steady direction, and the amount of time it has blown determines what about a wind driven current?Not learned 1612. The vertex of a great circle track is in LONG 109°E. Which longitude would an eastbound vessel cross the equator?Not learned 1613. A vertex of the navigational triangle is NOT located at the __________.Not learned 1614. The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?Not learned 1615. You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?Not learned 1616. Your vessel has changed course and is heading 285°T, you are on the charted range and it appears as in illustration D048NG below. After several minutes the range appears as in illustration D047NG below and your heading is still 285°T. What does this indicate?Not learned 1617. Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?Not learned 1618. Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?Not learned 1619. Your vessel is on a course of 207°T at 13 knots. At 0539 a light bears 180.5°T, and at 0620 the light bears 162°T. At what time and at what distance off will your vessel be when abeam of the light?Not learned 1620. Your vessel is on a course of 223°T at 17 knots. At 1323 a lighthouse bears 318° relative. At 1341 the same lighthouse bears 287° relative. What is your distance off the lighthouse at 1341?Not learned 1621. Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?Not learned 1622. Your vessel is on course 312°pgc and you sight a lighthouse dead ahead at a range of 10 miles. The gyro error is 3°E. What course would you steer to leave the lighthouse 1.5 miles abeam to starboard?Not learned 1623. Your vessel is located at position I on the weather map in illustration D013NG below. You should experience which weather condition?Not learned 1624. Your 1600 GRT vessel will be entering the navigable waters of the United States. You are required by regulations to take which action?Not learned 1625. Your vessel is entering port when you change course and steady up on a range with the lights in line. After a few minutes you observe the range lights as shown in illustration D047NG below. How should your heading be altered?Not learned 1626. Your vessel is entering port and you have steadied up on a range, dead ahead, in line with your keel. After a few minutes the range, still dead ahead, appears as shown in illustration D047NG below. Which action should you take?Not learned 1627. Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming your vessel's location is still at the equator?Not learned 1628. Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________.Not learned 1629. A vessel heading NW is on a course of __________.Not learned 1630. As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy?Not learned 1631. A vessel heading WNW is on which course?Not learned 1632. Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?Not learned 1633. Vessels should maintain a sharp lookout, especially during December through March, when navigating the Northern Right Whale's only known calving grounds. Where are the calving grounds located?Not learned 1634. Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?Not learned 1635. When your vessel is on or near the path of an approaching tropical storm the __________.Not learned 1636. Your vessel is participating in the Voluntary Observing Ship Program, at 0600 ZT on 31 January your position is LAT 00°49'S, LONG 84°27'E. You are preparing WS Form B-80 as seen in illustration D041NG below. How should you encode the first three groups after the call sign if you estimate the wind?Not learned 1637. Your vessel is participating in the Voluntary Observing Ship Program, at 1200 ZT on 31 August, your position is LAT 43°14'S, LONG 175°44'E. You are preparing WS Form B-80 as seen in illustration D041NG below. How should you encode the first three groups after the call sign if you estimate the wind?Not learned 1638. Your vessel is participating in the Voluntary Observing Ship Program, at 1200 ZT on 31 July, your position is LAT 24° 33' N, LONG 173° 05' W. You are preparing WS Form B-80 as seen in illustration D041NG below. How should you encode the first three groups after the call sign if you estimate the wind?Not learned 1639. Your vessel is participating in the Voluntary Observing Ship Program, at 1800 ZT on 31 October your position is LAT 24°50'N, LONG 92°37'W. You are preparing WS Form B-80 as seen in illustration D041NG below. How should you encode the first three groups after the call sign if you estimate the wind?Not learned 1640. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 30° F (-1° C) and the wet bulb thermometer reads 28° F (-2° C). How would you encode the air temperature groups in the report?Not learned 1641. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B- 80 as seen in illustration D041NG below. The dry bulb thermometer reads 34°F and the wet bulb thermometer reads 31°F. How would you encode the air temperature groups in the report?Not learned 1642. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 54°F and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report?Not learned 1643. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The dry bulb thermometer reads 78°F and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report?Not learned 1644. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. You are hove to in a hurricane on a heading of 328°T. The wind is from 030° true at 119 knots. How should this be encoded on the weather report form?Not learned 1645. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. One-half of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 340° relative at 14 knots. You are on course 307° T at 12.6 knots. How should you encode group Nddff?Not learned 1646. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. Your position is LAT 64°42'N, LONG 02°28'W. How would this be encoded?Not learned 1647. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The sky is overcast, and the anemometer indicates that the apparent wind is from 144° relative at 8 knots. You are on course 162°T at 15 knots. How should you encode group Nddff?Not learned 1648. Your vessel is participating in the Voluntary Observing Ship Program. You are preparing WS Form B-80 as seen in illustration D041NG below. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff?Not learned 1649. Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B- 80 as seen in illustration D041NG below. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062° relative at 13 knots. You are on course 238°T at 22 knots. How should you encode group Nddff?Not learned 1650. A vessel's position should be plotted using bearings of __________.Not learned 1651. While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyrocompass and the charted value of the range of lights is 359°T, what is the gyro compass error?Not learned 1652. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 178°T, and the variation is 9°W. If the heading of your vessel at the time of the sighting is 180° per standard magnetic compass, what is the deviation?Not learned 1653. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation?Not learned 1654. Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.Not learned 1655. Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate which of the following?Not learned 1656. Vessel required to have an Electronic Plotting Aid (EPA) must have a device to indicate the __________.Not learned 1657. A vessel sighting a northern right whale dead ahead should __________.Not learned 1658. A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line?Not learned 1659. When your vessel is on the storm track but behind the storm's center the __________.Not learned 1660. How does visibility change after the passage of a cold front?Not learned 1661. On a voyage along the coast of France, you sight a buoy with the top marks as shown in illustration D026NG below. How should you steer your vessel?Not learned 1662. On a voyage from Cape Town to London, which would be a favorable ocean current off the coast of Africa?Not learned 1663. On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.Not learned 1664. You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you navigate __________.Not learned 1665. You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you navigate __________.Not learned 1666. In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?Not learned 1667. When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.Not learned 1668. A warm air mass is characterized by __________.Not learned 1669. Warm air masses will generally have __________.Not learned 1670. When a warm air mass overtakes a cold air mass, which term is given to the contact surface?Not learned 1671. As a warm front approaches how does barometric pressure change?Not learned 1672. While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather should be forecasted?Not learned 1673. In waters where the cardinal system is used where would you expect to find danger?Not learned 1674. If your weather bulletin shows the center of a low-pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?Not learned 1675. If a weather bulletin shows the center of a low-pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere?Not learned 1676. What weather change accompanies the passage of a cold front in the Northern Hemisphere?Not learned 1677. Weather conditions in the middle latitudes generally move in which direction?Not learned 1678. Which weather element cannot be measured accurately while on board a moving vessel?Not learned 1679. Which weather element cannot be measured accurately while on board a moving vessel?Not learned 1680. Weather forecast messages are usually __________.Not learned 1681. A weather forecast states that the wind will commence backing. What does this indicate if you are in the Northern Hemisphere?Not learned 1682. A weather forecast states that the wind will commence veering. In the Northern Hemisphere, what changes will occur?Not learned 1683. When does a weather front exist?Not learned 1684. Weather information is available from __________.Not learned 1685. Weather information provided by the National Weather Service (NWS) advisories should be used along with which other source of information?Not learned 1686. On a weather map, what does a large letter "H" indicate?Not learned 1687. Weather observations provided by each weather station include all of the following except which item?Not learned 1688. Weather patterns in the Gulf of Mexico area of the United States are _____.Not learned 1689. In a weather report, the term "visibility" expresses __________.Not learned 1690. Weather systems in the middle latitudes generally travel from __________.Not learned 1691. Weather systems in the middle latitudes generally travel in which direction?Not learned 1692. Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?Not learned 1693. Which is a weekly publication advising mariners of important matters affecting navigational safety?Not learned 1694. For a well-made and well-maintained sextant, the maximum value of which correction is usually so small that it can be ignored?Not learned 1695. Where is the West Wind Drift located?Not learned 1696. What does a white buoy with a blue band signify?Not learned 1697. What does a white buoy with an open-faced orange diamond on it indicate?Not learned 1698. What does a white buoy with an orange circle marked on it indicate?Not learned 1699. What does a white buoy with an orange cross within a diamond marked on it indicate?Not learned 1700. What does a white buoy with an orange rectangle on it indicate?Not learned 1701. White lights may be found on which buoys?Not learned 1702. What do widely spaced isobars on a weather map indicate?Not learned 1703. Wind direction may be determined by observing all of the following EXCEPT __________.Not learned 1704. Which winds have the greatest effect on the set, drift, and depth of the equatorial currents?Not learned 1705. Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?Not learned 1706. Which wind results from a land mass cooling more quickly at night than an adjacent water area?Not learned 1707. What wind reverses directions seasonally?Not learned 1708. The winds of the "roaring forties" are strongest near which latitude?Not learned 1709. The wind speed and direction observed from a moving vessel is known as __________.Not learned 1710. What does a wind vane on a moving vessel show?Not learned 1711. The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.Not learned 1712. During the winter months, the southeast trade winds are __________.Not learned 1713. You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time where should you set the points of the dividers to obtain the most accuracy?Not learned 1714. You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, where should you set the points of the dividers to obtain the most accurate measurement?Not learned 1715. When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports at which time interval?Not learned 1716. If within 500 yards (460m) of a Northern Right Whale, you are lawfully obligated to take which actions?Not learned 1717. On a working copy of a weather map, a cold front is represented by what color line?Not learned 1718. On a working copy of a weather map what color is the line that represents a warm front?Not learned 1719. In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.Not learned 1720. The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?Not learned 1721. Which would you consult for information about the general current circulation in the North Atlantic Ocean?Not learned 1722. Where would you expect to find channels marked with the IALA-A Buoyage System?Not learned 1723. Where would you expect to find climatological and meteorological tables for the Gulf Coast area?Not learned 1724. Where would you find information about the time of high tide at a specific location on a particular day of the year?Not learned 1725. Where would you obtain data on currents for areas of the world not covered by the U.S. National Ocean Service?Not learned 1726. Which would be the subject of a NAVAREA warning?Not learned 1727. Yellow lights may appear on which buoys?Not learned 1728. Yesterday your chronometer read 02h 59m 58s at the 1500 GMT time tick. Today the chronometer reads 03h 00m 02s at the 1500 GMT time tick. What is the chronometer error?Not learned 1729. Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?Not learned 1730. Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?Not learned 1731. Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?Not learned 1732. Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 1200 time tick. What is the chronometer rate?Not learned 1733. Yesterday your chronometer read 11h 59m 59s at 1200 GMT time tick. Today the chronometer reads 12h 00m 01s at the 1200 GMT tick. What is the chronometer rate?Not learned 1734. Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error?Not learned 1735. Zenith distance is equal to __________.Not learned 1736. The zenith is the point on the celestial sphere that is __________.Not learned 1737. Your ship is entering port from sea, and you sight a pair of range lights. When in line, they bear 315° per standard magnetic compass. The chart shows that the range bearing is 312°T, and that variation is 6°W. What is the deviation of your compass at the time of the sighting?Not learned 1738. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 311°T, and the variation is 8°E. If the heading of your vessel at the time of the sighting is 305° per standard magnetic compass, what is the correct deviation?Not learned 1739. Which installed equipment on a towing vessel must be tested and logged when a new Master assumes command?Not learned 1740. Which statement(s) is/are TRUE concerning radio equipment on towing vessels of 26 feet or more in length?Not learned 1741. If the magnetic heading is greater than the compass heading, what direction is the deviation?Not learned 1742. What are the quadrantal spheres used for?Not learned 1743. What is the difference between magnetic heading and compass heading called?Not learned 1744. On 16 January, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is - 10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?Not learned 1745. On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. How should you pass this buoy?Not learned 1746. Which of the following is a compass card without north-seeking capability that is used for relative bearings?Not learned 1747. Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark shown in illustration D046NG below?Not learned 1748. Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on which side of the mark?Not learned 1749. On a working copy of a weather map what color is the line that represents a stationary front?Not learned 1750. Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown in illustration D046NG below?Not learned 1751. How is an occluded front represented on a weather map?Not learned 1752. In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 second intervals. Which of the four topmarks shown in illustration D030NG below would be fitted to this buoy?Not learned 1753. When using GPS, how many theoretical position lines are required for a three-dimensional fix?Not learned