Q124 - Navigation General: Oceans, USCG prep certification 2026

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1. Which type of daymark is used to mark the port side of the channel when entering from sea?Not learned 2. A magnetic compass card is marked in how many degrees?Not learned 3. The heading of a vessel is indicated by what part of the compass?Not learned 4. What does the lubber's line on a magnetic compass indicate?Not learned 5. A vessel heading NNW is on a course of __________.Not learned 6. A vessel heading NE is on which course?Not learned 7. A vessel heading WSW is on a course of __________.Not learned 8. A vessel heading SSE is on a course of __________.Not learned 9. Apparent wind speed blowing across a MODU under tow can be measured by a(n) __________.Not learned 10. 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 11. 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 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 east of your DR. Which statement is TRUE?Not learned 13. 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 14. 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 15. On 5 July, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?Not learned 16. How can the accuracy of an azimuth circle be checked?Not learned 17. For an accurate barometer check, you would __________.Not learned 18. What will act to dissipate fog?Not learned 19. Which action is the safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone?Not learned 20. Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?Not learned 21. When adjusting a magnetic compass for error, a deviation table should be made __________.Not learned 22. When adjusting a magnetic compass for error, which is TRUE concerning the deviation table?Not learned 23. What is an advantage of the magnetic compass aboard vessels?Not learned 24. What is NOT an advantage of the rhumb line track over a great circle track?Not learned 25. Advection fog is most commonly caused by __________.Not learned 26. Which agency maintains federal aids to navigation?Not learned 27. The agonic line on an isomagnetic chart indicates the __________.Not learned 28. Which aid is NOT marked on a chart with a magenta circle?Not learned 29. An air mass that has moved down from Canada would most likely have which symbols?Not learned 30. When is an air mass termed "warm"?Not learned 31. Air temperature varies with __________.Not learned 32. Which is TRUE of an alternating light?Not learned 33. How are altocumulus clouds defined?Not learned 34. 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 35. What is TRUE concerning an anemometer on a moving vessel?Not learned 36. An aneroid barometer on a boat should always be __________.Not learned 37. An aneroid barometer is an instrument __________.Not learned 38. Aneroid barometers are usually calibrated to indicate atmospheric pressure in which units?Not learned 39. At what angle to the isobars do surface winds blow over the open sea?Not learned 40. 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 41. 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 42. Where can the annual change in variation for an area be found?Not learned 43. How is the annual rate of change for magnetic variation shown on a pilot chart?Not learned 44. Which is another name for Universal time (UTI)?Not learned 45. 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 46. Which is a characteristic of anticyclones?Not learned 47. What is Apparent time based upon?Not learned 48. The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.Not learned 49. The apparent wind is zero when the true wind is __________.Not learned 50. 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 51. What should you apply to a fathometer reading to determine the depth of water?Not learned 52. As it approaches, what will a typical warm front bring?Not learned 53. You are approaching a light fitted with a RACON. The light may be identified on the radar by __________.Not learned 54. When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.Not learned 55. You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of radar?Not learned 56. 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 57. 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 58. 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 59. 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 60. 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 61. 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 62. 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 63. 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 64. What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9.5 GHz?Not learned 65. What area of the earth cannot be shown on a standard Mercator chart?Not learned 66. 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 67. Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel?Not learned 68. The ARPA may swap targets when automatically tracking if two targets are in which situation?Not learned 69. Your ARPA has two guard zones. What is the purpose of the inner guard zone?Not learned 70. 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 71. Which are associated with Cumulonimbus clouds?Not learned 72. On an Atlantic Ocean voyage from New York to Durban, South Africa, which is TRUE of the Agulhas Current?Not learned 73. Which term describes the atmosphere in the vicinity of a high pressure area?Not learned 74. Atmospheric pressure may be measured with a(n) __________.Not learned 75. Atmospheric pressure may be measured with which instrument?Not learned 76. Atmospheric pressure at sea level is equal to __________.Not learned 77. 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 78. Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.Not learned 79. Automatic identification systems (AIS) are required to do which of the following?Not learned 80. On which of the following does an automatic identification system (AIS) transponder transmit and receive information?Not learned 81. Which two channels does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?Not learned 82. 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 83. What is the average speed of the movement of a hurricane following the recurvature of its track?Not learned 84. What is the average speed of movement of a hurricane prior to recurvature?Not learned 85. To avoid error, how should you read the scale of an aneroid barometer?Not learned 86. Barometers are calibrated at which standard temperature?Not learned 87. What does a barometer measure?Not learned 88. When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.Not learned 89. Barometer readings in weather reports are given in terms of pressure at which reference location?Not learned 90. A barometer showing falling pressure indicates the approach of a __________.Not learned 91. What is a barometric pressure reading of 29.92 inches of mercury is equivalent to?Not learned 92. The bases of middle clouds are located at altitudes of between __________.Not learned 93. What is the basic principle of the magnetic compass?Not learned 94. 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 95. Which Beaufort force indicates a wind speed of 65 knots?Not learned 96. The Beaufort scale is used to estimate which element of the weather?Not learned 97. 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 98. The Benguela Current flows in which direction?Not learned 99. Which defines the height of tide?Not learned 100. The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.Not learned 101. The Brazil Current flows in which general direction?Not learned 102. Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.Not learned 103. What does a buoy with a composite group-flashing light indicate?Not learned 104. Which buoy will NOT display white retroreflective material?Not learned 105. Which of the buoys listed below could be used to mark an anchorage?Not learned 106. When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.Not learned 107. Buoys which mark dredging areas are painted which color?Not learned 108. How are buoys which mark isolated dangers painted?Not learned 109. Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?Not learned 110. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?Not learned 111. A buoy marking a wreck will show a(n) __________.Not learned 112. Which buoy may be even numbered?Not learned 113. Which buoy may be odd numbered?Not learned 114. Which buoy may be odd numbered?Not learned 115. Which buoy is NOT numbered?Not learned 116. A buoy having red and green horizontal bands would have which light characteristic?Not learned 117. The buoy symbol printed on your chart is leaning to the northeast. What does this indicate?Not learned 118. Which of the buoy symbols shown in illustration D032NG below indicates a safe water mark?Not learned 119. 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 120. In most cases, the direction of the apparent wind lies between the bow and which reference point?Not learned 121. If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, which action should you take?Not learned 122. What will cause the ARPA to emit a visual alarm, audible alarm, or both?Not learned 123. What causes compass deviation?Not learned 124. What causes variation in a compass?Not learned 125. 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 126. When changing from a compass course to a true course, which should you apply?Not learned 127. You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG below?Not learned 128. Which characteristic and color will a preferred-channel buoy show?Not learned 129. Which characteristics will a lighted buoy that is to be left to starboard, when entering a U.S. port from seaward have?Not learned 130. What is a characteristic of a rhumb line?Not learned 131. Which is a characteristic of the weather preceding an approaching warm front?Not learned 132. 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 133. 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 134. 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 135. Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.Not learned 136. 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 137. 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 138. 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 139. How are chart legends which indicate a conspicuous landmark printed?Not learned 140. What do chart legends printed in capital letters indicate about the associated landmark?Not learned 141. Chart legends printed in capital letters show that the associated landmark is __________.Not learned 142. How is a chart with a natural scale of 1:160,000 classified?Not learned 143. Which chart has a scale of 1:45,000Not learned 144. A chart with a scale of 1:80,000 would fall into which category?Not learned 145. Charts showing the coast of Mexico are produced by the United States __________.Not learned 146. On charts of U.S. waters, a magenta marking is NOT used for marking a __________.Not learned 147. Which defines the term charted depth?Not learned 148. What are Cirrus clouds primarily composed of?Not learned 149. What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?Not learned 150. What do clear skies, with the exception of a few cumulus clouds indicate?Not learned 151. 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 152. Clouds are classified according to their __________.Not learned 153. Which cloud commonly produces a halo about the Sun or Moon?Not learned 154. 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 155. Which cloud is described as a low, dark, sheet-like cloud which is associated with continuous precipitation for many hours?Not learned 156. 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 157. How are clouds formed?Not learned 158. When would cloud formations be minimal?Not learned 159. What is the name of a cloud of marked vertical development (often anvil-shaped) and produces showers?Not learned 160. Clouds with the prefix "nimbo" in their name __________.Not learned 161. A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of which front?Not learned 162. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 163. Which cloud type is normally associated with thunderstorms?Not learned 164. 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 165. A coastal chart could have a scale of __________.Not learned 166. Which is TRUE of the term coastal current?Not learned 167. When cold air displaces warm air you have a(n) __________.Not learned 168. 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 169. A cold front moving in from the northwest can produce __________.Not learned 170. As a cold front passes how do the pressure and the winds change?Not learned 171. What color lights do lighted information markers display?Not learned 172. What are the colors of a mid-channel daymark?Not learned 173. What is the color scheme of navigational marks used for informational or regulatory purposes?Not learned 174. What is a common unit of measure for atmospheric pressure?Not learned 175. Which is most commonly associated with fog?Not learned 176. Which is the most commonly encountered fog at sea?Not learned 177. When compared to air temperature, which factor is most useful in predicting fog?Not learned 178. Compared to a low pressure system, generally the air in a high is __________.Not learned 179. What is the compass course of a vessel heading NNE?Not learned 180. What is the compass course of a vessel heading ESE?Not learned 181. What is the compass course of a vessel heading NNW?Not learned 182. What is the compass course of a vessel heading NW?Not learned 183. What is the compass course of a vessel heading WNW?Not learned 184. What is the compass course of a vessel heading SW?Not learned 185. The compass deviation changes as the vessel changes __________.Not learned 186. Compass error is equal to the __________.Not learned 187. The compass error of a magnetic compass that has no deviation is __________.Not learned 188. Which is TRUE if the compass heading and the magnetic heading are the same?Not learned 189. The compass rose on a nautical chart indicates both variation and __________.Not learned 190. Which of the following compensates for errors introduced when a vessel heels over?Not learned 191. Which compensates for induced magnetism in the horizontal soft iron of a vessel?Not learned 192. Where can complete information on weather broadcasts throughout the world be found?Not learned 193. Which condition exists in the eye of a hurricane?Not learned 194. Which condition exists at the summer solstice in the Northern Hemisphere?Not learned 195. Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?Not learned 196. Which condition(s) is(are) necessary for the formation of dew?Not learned 197. Which condition will occur after a cold front passes?Not learned 198. Which condition suggests that your present position lies in the navigable semicircle of a tropical storm?Not learned 199. Which conditions should a vessel entering the eye of a hurricane expect?Not learned 200. Which condition would NOT indicate the approach of a tropical storm?Not learned 201. Which condition would most likely result in fog?Not learned 202. Which conic projection chart features straight lines which closely approximate a great circle?Not learned 203. Who should be consulted for changing conditions of controlling depths in major channels?Not learned 204. What does not contribute to the commercial GPS receiver position error?Not learned 205. By convention, what color is the south pole of a magnet painted?Not learned 206. By convention, the Earth's south magnetic pole is which color?Not learned 207. By convention, the north pole of a magnet is painted which color?Not learned 208. 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 209. Which correction(s) must be applied to an aneroid barometer?Not learned 210. Which correction must be applied to an aneroid barometer reading?Not learned 211. The correction(s) which must be applied to an aneroid barometer reading include(s) __________.Not learned 212. If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?Not learned 213. 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 214. You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?Not learned 215. You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?Not learned 216. 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 217. 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 218. You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?Not learned 219. 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 220. You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 221. 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 222. 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 223. You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?Not learned 224. You are on course 251°pgc and 241° per magnetic compass, when you observe a range in line bearing 192°pgc. The chart indicates that the range is in line on a bearing of 194°T. The variation is 16°E. What is the deviation of the magnetic compass?Not learned 225. 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 226. You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?Not learned 227. 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 228. 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 229. 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 230. 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 231. When crossing a front how do isobars tend to change?Not learned 232. Which of the following should be done when crossing the magnetic equator?Not learned 233. Cumulonimbus clouds are formed by __________.Not learned 234. Cumulonimbus clouds are most likely to accompany a(n) __________.Not learned 235. What do cumulus clouds that have undergone vertical development and have become cumulonimbus in form indicate?Not learned 236. When does a current perpendicular to a vessel's track have the greatest effect on the vessel's course made good?Not learned 237. Current refers to the __________.Not learned 238. Which current is responsible for the movement of large quantities of ice into the North Atlantic shipping lanes?Not learned 239. If the current and wind are in the same direction, the sea surface represents a wind speed __________.Not learned 240. If the current and wind are in opposite directions, the sea surface represents __________.Not learned 241. A cyclone in its final stage of development is called a(n) __________.Not learned 242. In a cyclone, where is the lowest pressure found?Not learned 243. Cyclones tend to move __________.Not learned 244. Which is the only cylindrical chart projection widely used for navigation?Not learned 245. The daily path of a celestial body that is parallel to the celestial equator is the __________.Not learned 246. The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.Not learned 247. The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.Not learned 248. Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?Not learned 249. The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.Not learned 250. Which data must ECDIS be able to record at one-minute intervals?Not learned 251. Which data must ECDIS be able to record at one-minute intervals?Not learned 252. Where can information about the direction and velocity of rotary tidal currents be found?Not learned 253. Which term is used to describe the database information that should be shown when a chart is first displayed on ECDIS?Not learned 254. 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 255. The datum from which the predicted heights of tides are reckoned in the tide tables is __________.Not learned 256. 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 257. Which datum is used for soundings on charts of the East Coast of the United States?Not learned 258. When daylight savings time is kept, the times of tide and current calculations must be adjusted. How can this be accomplished?Not learned 259. What daymark has NO lateral significance?Not learned 260. Which daymark has no lateral significance?Not learned 261. What daymark shape is used in the lateral system?Not learned 262. A daymark used to indicate the safe water in a channel will have which of the shapes shown in illustration D045NG below?Not learned 263. 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 264. A daymark used as a special mark is indicated by which letter in illustration D045NG below?Not learned 265. Daymarks marking the starboard side of the channel when going towards the sea are __________.Not learned 266. Which is TRUE of a dead reckoning (DR) plot?Not learned 267. A dead reckoning (DR) plot __________.Not learned 268. When should your dead reckoning position be plotted?Not learned 269. When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.Not learned 270. A decrease in barometric pressure is associated with all of the following except __________.Not learned 271. What defines a great circle?Not learned 272. Which defines an isotherm?Not learned 273. Which defines a light's luminous range?Not learned 274. The range of tide is the __________.Not learned 275. Which defines the shortest distance between any two points on earth?Not learned 276. Which defines the term relative humidity?Not learned 277. Which defines a wave's fetch?Not learned 278. What is the definition of height of tide?Not learned 279. The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.Not learned 280. The depth of water on a chart is indicated as 23 meters. What does that depth convert to?Not learned 281. The depth of the water is indicated on a chart as 32 meters. What is this equal to?Not learned 282. The vertical distance from the tidal datum to the level of the water is the __________.Not learned 283. Which describes a diurnal tide?Not learned 284. What describes an ebb current?Not learned 285. What describes a flood current?Not learned 286. 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 287. Which describes a line of position derived by radar range from an identified point on a coast?Not learned 288. Which is TRUE concerning privately maintained aids to navigation included in the Light List?Not learned 289. Which describes the result when you turn on the fast time constant (differentiator) control of a radar?Not learned 290. Which describes the visible range marked on charts for lights?Not learned 291. Which describes the wind circulation around a high-pressure center in the Northern Hemisphere?Not learned 292. What is the direction of rotation of tropical cyclones, tropical storms and hurricanes in the Northern Hemisphere?Not learned 293. What does the description "Racon" beside an illustration on a chart mean?Not learned 294. 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 295. You desire to make good a true course of 132°. The variation is 10°W, magnetic compass deviation is 5°E, and gyrocompass error is 5°W. A northeast by east wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make the true course good?Not learned 296. Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.Not learned 297. You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.Not learned 298. 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 299. Deviation is the angle between the __________.Not learned 300. Deviation is caused by __________.Not learned 301. Deviation in a compass is caused by which of the following?Not learned 302. Deviation which is maximum on intercardinal compass headings may be removed by the __________.Not learned 303. The dew point is reached when which condition occurs?Not learned 304. Which is TRUE concerning the dew point temperature?Not learned 305. The difference in degrees between true north and magnetic north is called __________.Not learned 306. Which is the difference between the DR position and a fix, both of which have the same time?Not learned 307. The difference between the heights of low and high tide is the __________.Not learned 308. The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.Not learned 309. The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.Not learned 310. The direction of prevailing winds in the Northern hemisphere is caused by the __________.Not learned 311. The direction of the surface wind is __________.Not learned 312. The direction a vessel is pointed at any given time is the __________.Not learned 313. The direction in which a vessel is steered is the course. The path actually followed is the __________.Not learned 314. The direction in which a vessel should be steered between two points is known by which term?Not learned 315. Which is TRUE for the directive force acting on a gyrocompass?Not learned 316. 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 317. Distance along a track line is measured on a Mercator chart by using which method?Not learned 318. What is the distance from the bottom of a wave trough to the top of a wave crest?Not learned 319. 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 320. 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 321. The distance to the nearest vertex from any point on a great circle track cannot exceed __________.Not learned 322. The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.Not learned 323. The diurnal inequality of the tides is caused by __________.Not learned 324. The diurnal pressure variation is most noticeable in the __________.Not learned 325. The diurnal variation of pressure is most noticeable __________.Not learned 326. The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.Not learned 327. Which is the dividing meridian between zone descriptions -4 and -5?Not learned 328. Which is the dividing meridian between zone descriptions -7 and -8?Not learned 329. When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.Not learned 330. What does the drift and set of tidal, river, and ocean currents refer to?Not learned 331. The dry bulb temperature is 56°F (13.3°C) and the wet bulb temperature is 56°F (13.3°C). What is the relative humidity?Not learned 332. The dry bulb temperature is 58° F (14.4° C) and the wet bulb temperature is 44° F (6.7° C). What is the relative humidity?Not learned 333. The dry bulb temperature is 78°F and the wet bulb temperature is 62°F. What is the relative humidity?Not learned 334. 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 335. When a dual-purpose marking is used, how should the mariner following the Intracoastal Waterway be guided?Not learned 336. Early indications of the approach of a hurricane may be all of the following EXCEPT __________.Not learned 337. 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 338. What is an ebb current?Not learned 339. ECDIS must be able to perform all of the following EXCEPT __________.Not learned 340. 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 341. ECDIS must give an alarm for which of the following cases?Not learned 342. ECDIS must give an alarm for which of the following cases?Not learned 343. ECDIS must give an alarm for which of the following cases?Not learned 344. An ECDIS is required to display which information?Not learned 345. An ECDIS is required to display which information?Not learned 346. An ECDIS is required to display which information?Not learned 347. ECDIS units incorporate Digital Chart Data Formats, which include __________.Not learned 348. All echo-sounders can measure the __________.Not learned 349. 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 350. When does the effects of priming of the tides occur?Not learned 351. Eight points of a compass are equal to how many degrees?Not learned 352. 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 353. An electronic depth finder operates on which principle?Not learned 354. Electronic Plotting Aid (EPA) has which built in functions?Not learned 355. Electronic Plotting Aid (EPA) has which built in functions?Not learned 356. An Electronic Plotting Aid (EPA) will drop off a target's vector if more than __________ minutes elapse between each manual plot.Not learned 357. 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 358. 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 359. 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 360. 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 361. 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 362. 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 363. 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 364. 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 365. 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 366. 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 367. 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 368. 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 369. 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 370. 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 371. 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 372. As you enter a U.S. channel from seaward, which is TRUE concerning the numbers on the buoys?Not learned 373. When entering a channel from seaward, the numbers on buoys __________.Not learned 374. Entering a harbor, you take a bearing on a range and get 338° per gyrocompass (pgc). The true bearing from the chart is 340°T. Variation for the area is 14°E. Your course is 329° per standard magnetic compass (psc) and 338°pgc. What is the deviation on this heading?Not learned 375. 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 376. 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 377. When entering from seaward, what does a buoy displaying a composite group (2+1) flashing red light indicate?Not learned 378. When entering from seaward, what does a buoy displaying a single-flashing red light indicate?Not learned 379. On entering from seaward, which is TRUE of a starboard side daymark?Not learned 380. Entering from seaward, what do triangular-shaped daymarks mark?Not learned 381. 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 382. 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 383. What is the equivalent of 2° 35' in time units?Not learned 384. Which error is NOT included in the term "current" when used in relation to a fix?Not learned 385. The error in a sextant altitude caused by refraction is greatest when the celestial body is in which location?Not learned 386. How can you estimate the position of a tropical storm's center?Not learned 387. 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 388. What should you expect when you encounter a tsunami in the open ocean?Not learned 389. You can expect frontal activity when two air masses collide and __________.Not learned 390. What does the expression "the air is saturated" mean?Not learned 391. The expression "first Magnitude" is usually used to refer only to bodies of which magnitude?Not learned 392. The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the __________.Not learned 393. 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 394. Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?Not learned 395. Which factor(s) is/are used to develop the charted information of a lighthouse?Not learned 396. What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?Not learned 397. Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?Not learned 398. Which is a feature of a special daymark?Not learned 399. To find a magnetic compass course from a true course what must you apply?Not learned 400. Which can you use to indicate the bearing of the center of a hurricane or tropical storm?Not learned 401. The first indications a mariner will have of the approach of a warm front will be __________.Not learned 402. Which is TRUE concerning a first magnitude star?Not learned 403. The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.Not learned 404. What is the FIRST sign of the existence of a well-developed tropical cyclone?Not learned 405. What is the first visible indication of the presence of a tropical cyclone or hurricane?Not learned 406. What does the Flinders bar on a magnetic compass compensate for?Not learned 407. The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?Not learned 408. The flow of air around an anticyclone in the Southern Hemisphere is __________.Not learned 409. Fog is most commonly associated with a(n) __________.Not learned 410. Fog forms when which condition exists?Not learned 411. Fog forms when the air temperature is at or below __________.Not learned 412. Fog is formed when __________.Not learned 413. Fog generally clears when the __________.Not learned 414. Fog is likely to occur when there is little difference between the dew point and the __________.Not learned 415. Which fog is produced by warm moist air passing over a cold surface?Not learned 416. Which of the following is the most accurate method of determining gyrocompass error while underway?Not learned 417. Which item is NOT associated with cumulonimbus clouds?Not learned 418. Which of the following is a boundary between two air masses?Not learned 419. Which of the following causes the development of an occluded front?Not learned 420. Which of the following causes a frontal thunderstorm?Not learned 421. Which of the following are data layer categories to be displayed on ECDIS?Not learned 422. Which of the following data layer categories is NOT displayed on ECDIS?Not learned 423. Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass?Not learned 424. Which of the following describes the principal purpose of magnetic compass adjustment?Not learned 425. All of the following can be found on a Pilot Chart EXCEPT information concerning which item?Not learned 426. Which of the following must an ECDIS system be able to perform?Not learned 427. Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?Not learned 428. Which of the following is the reference point to measure an azimuth angle for a body?Not learned 429. Which of the following represents the slope of a warm front?Not learned 430. Which of the following is a standard correction applied to the reading of an aneroid barometer?Not learned 431. Which of the following statements concerning frontal movements is TRUE?Not learned 432. Which of the following statements is FALSE?Not learned 433. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 434. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 435. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 436. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 437. Which of the following statements is TRUE regarding automatic identification systems (AIS)?Not learned 438. Which of the following traits possessed by an articulated light makes it superior to other types of buoys?Not learned 439. Which of the following typically happens to the barometric pressure after a cold front passes?Not learned 440. Which of the following is the most useful factor for predicting weather?Not learned 441. Which form of cloud, that is often known as "mackerel sky", is generally associated with fair weather?Not learned 442. 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 443. The four standard light colors used for lighted aids to navigation are red, green, white, and __________.Not learned 444. Freezing salt water spray should be anticipated when the air temperature drops below what temperature?Not learned 445. A gale is characterized by a wind speed of __________.Not learned 446. A general chart could have a scale of __________.Not learned 447. In general, on how many radio channels will an automatic identification system (AIS) operate?Not learned 448. Which general weather conditions should you expect to find in a low-pressure system?Not learned 449. A generally circular low pressure area is called a(n) __________.Not learned 450. What generally occurs when the land is cooler than the nearby water?Not learned 451. Generally speaking, you should expect to find low atmospheric pressure prevailing in the earth's __________.Not learned 452. Generally speaking, in the Northern Hemisphere, when winds are blowing from between SE and SW the barometric reading __________.Not learned 453. What is the geographic longitude of a body whose GHA is 215°15'?Not learned 454. What is the geographic longitude of a body whose GHA is 232°27'?Not learned 455. 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 456. 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 457. On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.Not learned 458. Good weather is usually associated with a region of __________.Not learned 459. The GP of a body for a high-altitude sight is determined from the declination and which other information?Not learned 460. Most GPS receivers use the Doppler shift of the carrier phase to compute __________.Not learned 461. What great circle is always needed to form the astronomical triangle?Not learned 462. A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?Not learned 463. A great circle will intersect the equator at how many degrees of longitude apart?Not learned 464. In which situation does a great circle track provides the maximum saving in distance?Not learned 465. The greater the pressure difference between a high and a low-pressure center, the __________.Not learned 466. When is the greatest directive horizontal force exerted on the magnetic compass of a vessel?Not learned 467. Red lights may appear on which buoys?Not learned 468. 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 469. What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?Not learned 470. 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 471. What happens to the barometric pressure after a cold front passes?Not learned 472. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 473. A harbor chart could have a scale of __________.Not learned 474. You are heading in a northerly direction when you come across an easterly current. Your vessel will respond in which manner?Not learned 475. 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 476. Heeling error is defined as the change of deviation for a heel of __________.Not learned 477. The height of a wave is the vertical distance from which reference points?Not learned 478. 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 479. In very high latitudes, the most practical chart projection is the __________.Not learned 480. Most high pressure areas in the United States are accompanied by __________.Not learned 481. As a high pressure system approaches, the barometer reading __________.Not learned 482. Which is TRUE when a high pressure system is centered north of your vessel in the Northern Hemisphere?Not learned 483. The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during which time frame?Not learned 484. Which system provides the highest level of commercial navigational accuracy?Not learned 485. In the horizon system of coordinates what is equivalent to the poles on the Earth?Not learned 486. 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 487. Hot air can hold __________.Not learned 488. A hurricane is characterized by winds of which speed?Not learned 489. 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 490. A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT __________.Not learned 491. When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.Not learned 492. The hurricane season in the North Atlantic Ocean reaches its peak during which month?Not learned 493. If a hurricane several hundred miles away is moving in your general direction your barometer would __________.Not learned 494. A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.Not learned 495. A hygrometer is a device used for determining __________.Not learned 496. Under the IALA-A and B Buoyage Systems, what does a buoy with alternating red and white vertical stripes indicate?Not learned 497. 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 498. 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 499. Under the IALA-A Buoyage System, when entering from seaward which buoy as shown in illustration D046NG below, should be left to starboard?Not learned 500. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?Not learned 501. Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark?Not learned 502. 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 503. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 504. Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE?Not learned 505. In illustration D039NG below, which number indicates cirrus clouds?Not learned 506. In illustration D039NG below, what type of cloud is indicated by the number five?Not learned 507. In illustration D039NG below, what type of cloud is indicated by the number four?Not learned 508. In illustration D039NG below, what type of cloud is indicated by the number one?Not learned 509. In illustration D044NG below, a pillar buoy is indicated by which letter?Not learned 510. In illustration D044NG below, what type of buoy is indicated by the letter A?Not learned 511. In illustration D045NG below, a green-and-red banded daymark, with the uppermost band green, will have which of the following shapes?Not learned 512. In illustration D045NG below, which shape is a daymark warning of danger?Not learned 513. In illustration D045NG below, what two shapes shown are used to indicate a preferred channel?Not learned 514. The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________.Not learned 515. Which is the most important information to be obtained from a barometer?Not learned 516. 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 517. 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 518. 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 519. 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 520. What indicates the arrival of a hurricane within 24 to 36 hours?Not learned 521. What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)Not learned 522. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?Not learned 523. Which indication on the barometer is most meaningful in forecasting weather?Not learned 524. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 525. 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 526. Where is induced magnetism found?Not learned 527. What information is found in the chart title?Not learned 528. What information is NOT found in the chart title?Not learned 529. Which information is found in the chart title?Not learned 530. Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?Not learned 531. Which information does the outer ring of a compass rose on a nautical chart provide?Not learned 532. Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?Not learned 533. Which information is NOT required to be posted in or near the wheelhouse?Not learned 534. How are you informed of defects or changes in aids to navigation?Not learned 535. You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?Not learned 536. 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 537. The instrument most commonly used to gather the data for determining the relative humidity is the __________.Not learned 538. An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.Not learned 539. An instrument that indicates wind direction is known as a(n) __________.Not learned 540. An instrument that maintains a continuous record of humidity changes is called a __________.Not learned 541. An instrument which maintains a continuous record of temperature changes is called a __________.Not learned 542. Which instrument may a towing vessel, engaged in towing exclusively on the Western Rivers, use in place of a magnetic compass?Not learned 543. What is used to measure wind velocity?Not learned 544. Which instrument is used to measure the relative humidity of the air?Not learned 545. Which instrument is used to predict the approach of a low pressure system?Not learned 546. An instrument useful in predicting fog is the __________.Not learned 547. How is the intensity of a light expressed in the Light Lists?Not learned 548. Isobars on a weather map are useful in predicting which element of the weather?Not learned 549. Isogonic lines are lines on a chart indicating __________.Not learned 550. On an isomagnetic chart, the line of zero variation is the __________.Not learned 551. Which item in illustration D034NG below shows a flashing light?Not learned 552. 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 553. Which is TRUE of a katabatic wind?Not learned 554. Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?Not learned 555. What kind of pressure systems travel in tropical waves?Not learned 556. What kind of weather would you expect to accompany the passage of a tropical wave?Not learned 557. 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 558. The largest waves (heaviest chop) will usually develop where the wind blows __________.Not learned 559. 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 560. Which is TRUE of a lateral system buoy displaying a quick flashing light?Not learned 561. A latitude line will be obtained by observing a body __________.Not learned 562. The latitude of the upper vertex of a great circle is 36°N. What is the latitude of the lower vertex?Not learned 563. The left half of the storm is called the navigable semicircle because __________.Not learned 564. What is the length of a nautical mile?Not learned 565. The length of a wave is the length __________.Not learned 566. 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 567. A very light breeze that causes ripples on a small area of still water is a known by which term?Not learned 568. Which light characteristic may be used on a special mark?Not learned 569. Which light characteristic may be used on a special purpose mark?Not learned 570. 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 571. 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 572. Which is TRUE concerning Light Lists for coastal waters?Not learned 573. The Light List indicates that a dayboard is a type KGW. You should take which action?Not learned 574. The Light List indicates that a dayboard is a type MR. You should take which action?Not learned 575. The Light List indicates that a dayboard is a type NB. You should __________.Not learned 576. The Light List indicates that a dayboard is a type TR-SY. Which action should you take?Not learned 577. 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 578. 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 579. 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 580. 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 581. 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 582. 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 583. 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 584. 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 585. 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 586. What is the light phase characteristic of a lighted isolated-danger mark?Not learned 587. The light rhythm of MorseNot learned 588. Which would you expect to see on a lighted preferred-channel buoy?Not learned 589. What is a lighted safe water mark fitted with to aid in its identification?Not learned 590. Lighted white and orange buoys must show which color light?Not learned 591. 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 592. What is the name given to lines on a chart which connect points of equal magnetic variation?Not learned 593. A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.Not learned 594. The line connecting the points of the earth's surface where there is no dip is the __________.Not learned 595. A line connecting all possible positions of your vessel at any given time is a __________.Not learned 596. The line which connects the points of zero magnetic dip is __________.Not learned 597. Lines drawn through points on the Earth having the same atmospheric pressure are known by which term?Not learned 598. A line of position is __________.Not learned 599. A line of position from a celestial observation is a segment of which choice?Not learned 600. The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.Not learned 601. A line of position formed by sighting two charted objects in line is called a(n) __________.Not learned 602. Lines of position may be __________.Not learned 603. Which term is given to a line on a weather chart connecting places which have the same barometric pressure?Not learned 604. Which list of clouds is in sequence, from highest to lowest in the sky?Not learned 605. Which of the listed properties does warm air possess?Not learned 606. Little or no change in the barometric reading over a twelve hour period indicates __________.Not learned 607. 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 608. You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.Not learned 609. Which location is a source for an air mass labeled mTw?Not learned 610. You should log all barometer readings taken at sea __________.Not learned 611. How long would a steady wind need to blow in order to create a wind driven current?Not learned 612. 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 613. The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?Not learned 614. Why are low altitude sun sights not generally used?Not learned 615. A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.Not learned 616. In low latitudes, the high(s) of the diurnal variation of pressure occur(s) at __________.Not learned 617. In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.Not learned 618. In low latitudes the range of the diurnal variation of pressure is up to __________.Not learned 619. When a low pressure area is approaching, the weather generally __________.Not learned 620. Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.Not learned 621. Which is a low, uniform layer of cloud resembling fog, but not resting on the ground?Not learned 622. The lunar or tidal day is __________.Not learned 623. Magnets in the binnacles of magnetic compasses are used to reduce which effect?Not learned 624. What do the magnets placed in horizontal trays in the compass binnacle compensate for?Not learned 625. 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 626. If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?Not learned 627. What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?Not learned 628. Which is TRUE concerning magnetic compass deviation?Not learned 629. 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 630. What is magnetic dip a measurement of?Not learned 631. At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.Not learned 632. Magnetic information on a chart may be __________.Not learned 633. Magnetic variation changes with a change in __________.Not learned 634. Which term is given to magnetism which is present only when the material is under the influence of an external field?Not learned 635. What is the major advantage of a rhumb line track?Not learned 636. What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?Not learned 637. What is the major problem with taking high altitude sun observations?Not learned 638. 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 639. When making landfall at night, how can you determine if a light is a major light or an offshore buoy?Not learned 640. 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 641. In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. What causes the development of these clouds?Not learned 642. How many characters does the short text messaging feature of the automatic identification system (AIS) allow for?Not learned 643. How many points are there in a compass card?Not learned 644. How many slack tidal currents usually occur each day on the east coast of the United States?Not learned 645. How many targets can an Electronic Plotting Aid (EPA) track at the same time?Not learned 646. At the master gyrocompass, the compass card is attached to the __________.Not learned 647. If you are the Master of a towing vessel who’s only working radar no longer functions, what must you do?Not learned 648. Which term is used to express the maximum distance at which a light may be seen under existing visibility conditions?Not learned 649. Mean high water is the average height of __________.Not learned 650. What is the reference datum mean high water used to measure?Not learned 651. Which measurement uses mean high water as the reference plane?Not learned 652. Which is TRUE of mean high water?Not learned 653. Mean low water is the average height of __________.Not learned 654. Mean lower low water is the reference plane used for which measurements?Not learned 655. 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 656. On a Mercator chart, 1 nautical mile is equal to __________.Not learned 657. Which type of projection is used to make a Mercator chart?Not learned 658. 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 659. 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 660. Miaplacidus is found in what constellation?Not learned 661. In a microbarograph, when should the pen be checked and the inkwell filled?Not learned 662. A microbarograph is a precision instrument that provides a __________.Not learned 663. A mid-channel buoy, if lighted, will show a __________.Not learned 664. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?Not learned 665. On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.Not learned 666. A millibar is a unit of __________.Not learned 667. In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.Not learned 668. Which is TRUE of Monsoons?Not learned 669. In which months will the North Equatorial Countercurrent be strongest?Not learned 670. During the month of October, which describes the Sun's declination?Not learned 671. When the Moon's declination is maximum north, which of the following will occur?Not learned 672. 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 673. A mooring buoy, if lighted, shows which color light?Not learned 674. 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 675. The movement of water away from the shore or downstream is called a(n) __________.Not learned 676. What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage?Not learned 677. Which name is given to the pressure-sensitive element of an aneroid barometer?Not learned 678. The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of which area?Not learned 679. The National Weather Service differentiates between small craft, gale, whole gale, and hurricane warnings by the __________.Not learned 680. On a nautical chart, what does the inner ring of a compass rose indicate?Not learned 681. Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?Not learned 682. A nautical mile is a distance of approximately how much greater than or less than a statute mile?Not learned 683. Which Naval Control of Shipping publication should be aboard your vessel?Not learned 684. A NAVAREA warning carries the following number: 1986/87 (11). Which statement is TRUE?Not learned 685. The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.Not learned 686. The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?Not learned 687. The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.Not learned 688. When navigating coastwise and hurricane warnings are received, you should __________.Not learned 689. 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 690. When navigating in high latitudes and using a chart based on a Lambert conformal projection, which is TRUE?Not learned 691. When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?Not learned 692. Which is TRUE when navigating a vessel?Not learned 693. How is a navigation light identified on an Army Corps of Engineers navigation map?Not learned 694. 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 695. Which navigational mark may only be lettered?Not learned 696. For navigational purposes, each great circle on the Earth has a length of __________.Not learned 697. 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 698. When should a navigator rely on the position of floating aids to navigation?Not learned 699. When do neap tides occur?Not learned 700. The needle of an aneroid barometer points to 30.05 on the dial. What does this indicate?Not learned 701. 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 702. Above-normal tides near the center of a hurricane may be caused by the __________.Not learned 703. In North America, which direction do the majority of the weather systems move?Not learned 704. 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 705. 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 706. 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 707. In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.Not learned 708. 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 709. 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 710. In the Northern Hemisphere, where will the largest waves or swells created by a typhoon or hurricane be located?Not learned 711. In the Northern Hemisphere, an observer at point II in illustration D014NG below, should experience a wind shift from what direction?Not learned 712. In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle. Which statement(s) is/are TRUE?Not learned 713. In the Northern hemisphere which semicircle of a hurricane is the navigable semicircle?Not learned 714. In the Northern Hemisphere, swells that have outrun the storm are produced in which location?Not learned 715. In the Northern Hemisphere, which term is given to a wind that shifts counterclockwise?Not learned 716. 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 717. 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 718. In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?Not learned 719. 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 720. 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 721. Which is TRUE in the Northern Hemisphere when a wind is said to veer?Not learned 722. In the Northern Hemisphere, what do winds veering sharply to the west or northwest with increasing speed indicate?Not learned 723. What do the numbers on isobars indicate?Not learned 724. What does the numeral in the center of a wind rose circle on a pilot chart indicate?Not learned 725. A nun buoy will __________.Not learned 726. If you observe a buoy off station which action should you take?Not learned 727. If you observe a rapid fall of barometric pressure, which action should you take?Not learned 728. 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 729. When observing a rapid rise in barometric pressure, what may you expect?Not learned 730. How is an occluded front represented on a weather map?Not learned 731. What occurs when rising air cools to the dew point?Not learned 732. 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 733. Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?Not learned 734. Ocean swells originating from a typhoon can move ahead of it at speeds near __________.Not learned 735. One point of a compass is equal to how many degrees?Not learned 736. During one synodic rotation, a body makes one complete turn relative to the __________.Not learned 737. When operated over a muddy bottom, a fathometer may indicate which of the following?Not learned 738. On what does the operation of an aneroid barometer depend?Not learned 739. What option does an Electronic Plotting Aid (EPA) not have?Not learned 740. An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?Not learned 741. An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?Not learned 742. An orange and white buoy marking a danger area will have what symbol on it?Not learned 743. An orange and white buoy with a rectangle on it displays what information?Not learned 744. In order to insure that the racon signal is visible on your 3 cm radar, the __________.Not learned 745. In order to remove side error from a sextant, which adjustment can be made?Not learned 746. You are outbound in a buoyed channel on course 015°T. You sight a white light showing a MorseNot learned 747. 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 748. When outbound from a U.S. port, what does a buoy displaying a flashing red light indicate?Not learned 749. 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 750. 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 751. 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 752. 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 753. 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 754. 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 755. The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged __________.Not learned 756. The passing of a low pressure system can be determined by periodically checking the __________.Not learned 757. Which term defines the paths of intended travel between three or more points?Not learned 758. 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 759. When is the peak of the hurricane season in the western North Pacific?Not learned 760. Which refers to the period at high or low tide during which there is no change in the height of the water?Not learned 761. What does the period of a lighted aid to navigation refer to?Not learned 762. Permanent magnetism is caused by __________.Not learned 763. The permanent magnetism of a vessel may change in polarity due to __________.Not learned 764. The permanent magnetism of a vessel may change in strength due to __________.Not learned 765. The permanent magnetism of a vessel may change in strength due to __________.Not learned 766. A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.Not learned 767. 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 768. A pilot chart does NOT contain information about which item?Not learned 769. You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?Not learned 770. 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 771. The points on the earth's surface where the magnetic dip is 90° are __________.Not learned 772. Which term is used to define the point where the vertical rise or fall of tide has stopped?Not learned 773. 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 774. Port side daymarks may be __________.Not learned 775. When possible, a DR plot should always be started from where?Not learned 776. The precession of the equinoxes occurs in which direction?Not learned 777. To predict the actual depth of water using the Tide Tables, how does one use the number obtained from the Tide Tables?Not learned 778. How do preferred channel buoys indicate the preferred channel to transit?Not learned 779. A preferred-channel buoy may be __________.Not learned 780. The presence of stratus clouds and a dying wind will usually result in __________.Not learned 781. 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 782. The pressure gradient between the horse latitudes and doldrums runs __________.Not learned 783. Pressure gradient is a measure of __________.Not learned 784. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?Not learned 785. The probability of a sudden wind may be foretold by __________.Not learned 786. 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 787. "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding ________.Not learned 788. The process by which the temperature and/or moisture characteristics of an air mass changes is called __________.Not learned 789. 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 790. Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?Not learned 791. Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States?Not learned 792. 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 793. Which publication would describe the explosive anchorages in the ports on the east coast of the United States?Not learned 794. Which publication would NOT be used on a voyage from Houston to New York?Not learned 795. What is the purpose of the "reference hand" on an aneroid barometer?Not learned 796. The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.Not learned 797. Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?Not learned 798. 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 799. Which radar control reduces weak echoes out to a limited distance from the ship?Not learned 800. Which radar control shortens all echoes on the display and reduces clutter caused by rain or snow?Not learned 801. Which radar control is used to reduce sea return at close ranges?Not learned 802. Which term is given to a radar display which is oriented, so that north is always at the top of the screen?Not learned 803. 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 804. 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 805. Radar makes the most accurate determination of the __________.Not learned 806. A radar range to a small, charted object such as a light will provide a line of position in which form?Not learned 807. 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 808. Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope?Not learned 809. Which is TRUE of Radiation fog?Not learned 810. A rapid rise or fall of the barometer indicates __________.Not learned 811. Which is TRUE of Raster-scan chart data?Not learned 812. What is the reaction of a gyrocompass to an applied force known as?Not learned 813. In reading a weather map, what do closely spaced pressure gradient lines indicate?Not learned 814. The recording fathometer produces a graphic record of the __________.Not learned 815. When recording the wind direction in the weather log, which information would you report?Not learned 816. After the recurvature of a hurricane's track, which describes the result of its forward speed?Not learned 817. Recurvature of a hurricane's track usually results in the forward speed __________.Not learned 818. A red triangular daymark marks __________.Not learned 819. Which is the reference datum used in determining the heights of land features on most charts?Not learned 820. With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.Not learned 821. In both regions of the IALA buoyage system, which topmark shown in illustration D022NG below is used on a special mark?Not learned 822. A relative bearing is always measured from __________.Not learned 823. What is the relative bearing of an object on the port beam?Not learned 824. What is the relative bearing of an object broad on the port bow?Not learned 825. What is the relative bearing of an object broad on the port quarter?Not learned 826. What is the relative bearing of an object on the starboard beam?Not learned 827. What is the relative bearing of an object broad on the starboard bow?Not learned 828. What is the relative bearing of an object broad on the starboard quarter?Not learned 829. What is the relative bearing of an object dead astern?Not learned 830. What is the relative bearing of an object sighted dead ahead?Not learned 831. 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 832. In the relatively calm area near the hurricane center, the seas are __________.Not learned 833. You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?Not learned 834. When reporting wind direction, how should you give the direction?Not learned 835. With respect to automatic identification systems (AIS) which of the following information is broadcast every one to ten seconds?Not learned 836. With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?Not learned 837. With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?Not learned 838. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 839. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 840. With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?Not learned 841. With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.Not learned 842. With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.Not learned 843. With respect to a reversing current, when does slack water occur?Not learned 844. What results when warm moist air blows over a colder surface and is cooled below its dew point?Not learned 845. When is a revised print of a chart made?Not learned 846. The revision date of a chart is printed on which area of the chart?Not learned 847. When is the rhumb line distance the same as the great circle distance?Not learned 848. The rise and fall of the ocean's surface due to a distant storm is known as __________.Not learned 849. 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 850. In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.Not learned 851. 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 852. On which route is a towing vessel over 39.4 feet in length NOT required to carry an echo-sounding device?Not learned 853. 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 854. Safe water buoys may show ONLY which type of light?Not learned 855. A safe water daymark has what shape?Not learned 856. A safe water mark may be __________.Not learned 857. How is a safe water mark, that can be passed close aboard on either side, painted and lighted?Not learned 858. A sailing chart could have which scale?Not learned 859. 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 860. 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 861. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which of the following is TRUE?Not learned 862. 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 863. Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.Not learned 864. The scale on a chart is given as 1:5,000,000. What does this ratio indicate?Not learned 865. Which scale is used to estimate wind speed by observing sea conditions?Not learned 866. Which is TRUE of a sea breeze?Not learned 867. A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.Not learned 868. The set of the current is the __________.Not learned 869. Set of the current is __________.Not learned 870. 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 871. Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.Not learned 872. 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 873. 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 874. 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 875. 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 876. If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?Not learned 877. If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________.Not learned 878. 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 879. What does the shoreline on charts generally represent?Not learned 880. The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.Not learned 881. A sidereal day is shorter than a solar day. What is the reason for this difference?Not learned 882. 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 883. You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions?Not learned 884. A sign of thunderstorm development is a cumulus cloud __________.Not learned 885. How will the signal from a ramark show on the PPI?Not learned 886. A single barometric pressure reading of 28.60 indicates __________.Not learned 887. A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.Not learned 888. When slanted letters are used to spell the name of a charted object you know the __________.Not learned 889. A sling psychrometer is a(n) __________.Not learned 890. What is a sling psychrometer used to measure?Not learned 891. What does a slow, gradual fall of the barometer indicate?Not learned 892. What does a slow rise in the barometric pressure forecast?Not learned 893. 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 894. 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 895. Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________.Not learned 896. What do solid green arrows on the main body of a pilot chart indicate?Not learned 897. 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 898. 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 899. In which source could you find the vertical clearance of a bridge on the Ohio River?Not learned 900. In the Southern Hemisphere the wind circulation in a high pressure system rotates in which direction?Not learned 901. In the Southern Hemisphere winds in a low pressure system rotate in which direction?Not learned 902. A special mark (yellow buoy), if lighted, may exhibit which light rhythm?Not learned 903. A special purpose buoy shall be __________.Not learned 904. Which term is used to describe the speed at which an ocean wave system advances?Not learned 905. The speed of sound through ocean water is nearly always __________.Not learned 906. The speed of sound in water is approximately __________.Not learned 907. A spherical buoy may be __________.Not learned 908. 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 909. 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 910. Spring tides are tides that __________.Not learned 911. Squall lines with an almost unbroken line of threatening dark clouds and sharp changes in wind direction, generally precede which front?Not learned 912. "Stand" of the tide is that time when __________.Not learned 913. What is the standard atmospheric pressure as measured in inches of mercury?Not learned 914. What is the standard atmospheric pressure in millibars?Not learned 915. How does the standard magnetic compass heading differ from the true heading?Not learned 916. Which is the standard meridian for the time zone +1?Not learned 917. What is the standard time meridian for zone description -1?Not learned 918. The Star Lists in the Nautical Almanac are based on which of the following magnitudes?Not learned 919. A star is observed at lower transit. The line of position derived from this sight is __________.Not learned 920. Which statement concerning the chartlet in illustration D010NG below is true? (Soundings and heights are in meters)Not learned 921. Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters)Not learned 922. Which statement concerning current is TRUE?Not learned 923. Which statement concerning GPS is TRUE?Not learned 924. Which statement is FALSE concerning the dangerous semicircle of a hurricane?Not learned 925. Which statement about the Flinders bar of the magnetic compass is CORRECT?Not learned 926. Which statement about a gnomonic chart is correct?Not learned 927. Which statement about gyrocompass error is TRUE?Not learned 928. Which statement about the gyrocompass is FALSE?Not learned 929. Which statement is TRUE when comparing cold and warm fronts?Not learned 930. Which statement is TRUE concerning a Mercator projection?Not learned 931. Which statement is TRUE for an unlighted, red and green, horizontally-banded buoy with the topmost band red?Not learned 932. Steady precipitation is typical of __________.Not learned 933. Steam fog will occur when which conditions exists?Not learned 934. You are steaming on a course of 084°T at a speed of 13 knots. At 1919 a lighthouse bears 106.5°T. At 1957 the same lighthouse bears 129°T. What will be your distance off the lighthouse when abeam?Not learned 935. 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 936. 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 937. 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 938. 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 939. What does a steep barometric gradient indicate?Not learned 940. The steepness of a cold front depends on __________.Not learned 941. 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 942. 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 943. 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 944. 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 945. 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 946. A storm's track is characterized by all of the following except __________.Not learned 947. Stormy weather is usually associated with regions of __________.Not learned 948. All straight lines represent great circle tracks on a chart based on which projection?Not learned 949. Which wind is a strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months?Not learned 950. The strongest winds and heaviest rains in a hurricane are found in the __________Not learned 951. The summer solstice is the point where the Sun is at __________.Not learned 952. The Sun at a maximum declination north would be approximately at __________Not learned 953. The survey information upon which a chart is based is found at which location?Not learned 954. A survey (special purpose mark) buoy __________.Not learned 955. Swells that have outrun the storm are produced in the __________.Not learned 956. Swell is the rise and fall of the ocean's surface due to __________.Not learned 957. 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 958. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 166°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 239.5° 234° 269.0° 264° 210.0° 204° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 959. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 143°. PSC PGC 030.5° 020° 061.5° 050° 092.0° 080° 122.5° 110° 152.0° 140° 181.0° 170° 210.0° 200° 239.5° 230° 269.0° 260° 298.0° 290° 327.5° 320° 358.5° 350°Not learned 960. A sylphon cell is a part of which instrument?Not learned 961. 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 962. 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 963. Which symbol represents a 10-fathom curve?Not learned 964. Which symbol represents a 2-fathom curve?Not learned 965. Which of the symbols shown in illustration D018NG below represents an occluded front?Not learned 966. Which of the symbols shown in illustration D018NG below represents a warm front?Not learned 967. What does the symbol shown in illustration D033NG below indicate on a chart?Not learned 968. What is a system of reservoirs and connecting tubes in a gyro compass called?Not learned 969. You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?Not learned 970. You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?Not learned 971. You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?Not learned 972. 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 973. 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 974. Which is TRUE as the temperature of an air mass decreases?Not learned 975. Which is TRUE as the temperature of the air reaches the dew point?Not learned 976. 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 977. How does the temperature change with the passage of an occluded front?Not learned 978. Which is TRUE as the temperature for a given mass of air increases?Not learned 979. Temperature and moisture characteristics are modified in a warm or cold air mass due to which factor?Not learned 980. The term "flood current" refers to that time when the water __________.Not learned 981. Which term is given to the dense black cumulonimbus clouds surrounding the eye of a hurricane?Not learned 982. Which is the term given to the time required for a lighted aid to complete a full cycle of light changes?Not learned 983. Which term is given to the vertical angle between the horizontal and the magnetic line of force?Not learned 984. Which term refers to the direction a current is flowing?Not learned 985. What does the term "tide" refer to?Not learned 986. Which term is used to describe the line connecting the points of the earth's surface where there is no magnetic dip?Not learned 987. The test of a towing vessel's steering gear control system includes each item EXCEPT __________.Not learned 988. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 989. Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.Not learned 990. Which is TRUE of the tides in Boston Harbor?Not learned 991. When the time is based on the movement of the visible Sun along the ecliptic the time is known as __________.Not learned 992. A time diagram is a diagram of the celestial sphere as observed from above which location?Not learned 993. The time interval between successive wave crests is called the __________.Not learned 994. The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.Not learned 995. Which time meridian is used when computing the velocity of the current for Pensacola Bay, Florida?Not learned 996. Which time meridian is used for tide computations in New York Harbor?Not learned 997. Time signals broadcast by WWV and WWVH are transmitted __________.Not learned 998. When a tornado moves over the water from land it is called a __________.Not learned 999. 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 1000. Towing vessels of more than 39.4 feet in length must carry charts or maps __________.Not learned 1001. Which towing vessel(s) is/are exempt from carrying radar?Not learned 1002. A towing vessel is NOT required to be fitted with radar if it is __________.Not learned 1003. A towing vessel is NOT required to be fitted with radar if it is __________.Not learned 1004. The track line on the chart is 274°T. Variation is 4°E, and deviation is 2°E. The gyro error is 1.5°E. What course would be steered by gyrocompass to make good the desired course?Not learned 1005. A triangular daymark would be colored __________.Not learned 1006. Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?Not learned 1007. Tropical cyclones do not form within 5° of the Equator because __________.Not learned 1008. Tropical cyclones normally form within which of the following belts of latitude?Not learned 1009. In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is located in which position?Not learned 1010. Tropical storms and hurricanes are most likely to form in the Southern hemisphere during which months?Not learned 1011. A tropical storm is a tropical cyclone that generates winds of which speed?Not learned 1012. A tropical wave is usually preceded by __________.Not learned 1013. The tropical year differs from which year by 20 minutes?Not learned 1014. A true bearing of a charted object, when plotted on a chart, will establish a __________.Not learned 1015. Which is TRUE concerning Spring tides?Not learned 1016. Which is TRUE concerning Wind velocity?Not learned 1017. The true course from point A to point B is 317°. A SSW wind causes a 4° leeway, variation is 6°W and deviation is 1°E. What is the magnetic compass course to steer to make good the true course?Not learned 1018. The true course between two points is 057°. Your gyrocompass has an error of 3° east and you make an allowance of 1° leeway for a north-northwest wind. Which gyro course should be steered to make the true course good?Not learned 1019. Which is TRUE of the dangerous semicircle of a hurricane in the Northern Hemisphere?Not learned 1020. Which is TRUE of a dead reckoning (DR) plot?Not learned 1021. What is true about a front?Not learned 1022. True heading differs from magnetic heading by __________.Not learned 1023. Which is TRUE when using the radar for navigation?Not learned 1024. Which is TRUE of the velocity of the current in large coastal harbors?Not learned 1025. Which is TRUE of a vertically-striped buoy?Not learned 1026. A tsunami is caused by a(n) __________.Not learned 1027. Two well-developed high-pressure areas may be separated by which item?Not learned 1028. Two well-developed low pressure areas may be separated by a __________.Not learned 1029. Which type of cloud is among the most dependable for giving an indication of an approaching weather system?Not learned 1030. What type of clouds are associated with a cold front?Not learned 1031. Which type of cloud is the classic "thunderhead"?Not learned 1032. Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?Not learned 1033. Which type of cloud formation should be of immediate concern to small craft operators?Not learned 1034. Which type of cloud is hail most likely to fall from?Not learned 1035. From which type of cloud can a tornado or waterspout develop?Not learned 1036. The type of current which will have the greatest effect on the course made good for your vessel is __________.Not learned 1037. Which type of daymark is used to mark the starboard side of the channel when entering from sea?Not learned 1038. Which type of fog occurs on clear nights with very light breezes and forms when the earth cools rapidly?Not learned 1039. Which type of front forms when a cold front overtakes and forces a warm front upwards?Not learned 1040. Which type of frontal passage is associated with a relatively narrow band of precipitation?Not learned 1041. Which type of GPS receiver has at least four channels to process information from several satellites simultaneously?Not learned 1042. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?Not learned 1043. Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?Not learned 1044. The typical operating range of automatic identification systems (AIS) at sea is nominally __________.Not learned 1045. What is typical of warm front weather conditions?Not learned 1046. Under the U.S. Aids to Navigation System, which category is a yellow buoy?Not learned 1047. In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic?Not learned 1048. In the U.S. Aids to Navigation System, what do red and green horizontally-banded buoys mark?Not learned 1049. Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics?Not learned 1050. 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 1051. 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 1052. While underway, automatic identification systems (AIS) broadcast all of the following information every 1 to 10 seconds EXCEPT the __________.Not learned 1053. 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 1054. 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 1055. 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 1056. 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 1057. 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 1058. 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 1059. 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 1060. 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 1061. 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 1062. 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 1063. 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 1064. 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 1065. 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 1066. 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 1067. 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 1068. 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 1069. Under the Uniform State Waterway Marking System how is a mooring buoy painted?Not learned 1070. In the United States, who broadcasts the short-range radio navigational warnings?Not learned 1071. In United States waters, a buoy having red and white vertical stripes if lighted, it will have which light characteristic?Not learned 1072. At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.Not learned 1073. 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 1074. When using an ARPA, what should you consider in order to evaluate the information displayed?Not learned 1075. When using the ARPA in heavy rain, which action should you take?Not learned 1076. When using a buoy as an aid to navigation which of the following should be considered?Not learned 1077. When using an echo sounder in deep water, it is NOT unusual to encounter which situation?Not learned 1078. When using GPS, how many theoretical position lines are required for a two-dimensional fix?Not learned 1079. When using GPS without Selective Availability, what can you expect your horizontal accuracy to be of the unit?Not learned 1080. When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?Not learned 1081. When using a Lambert conformal chart in high latitudes, which reference is used to measure angles such as bearings or courses?Not learned 1082. When using a mechanical (windup type) marine chronometer, how often should it be reset?Not learned 1083. 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 1084. 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 1085. 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 1086. Using the surface analysis in illustration D049NG below, what weather conditions would you expect to find at position A?Not learned 1087. Using the surface analysis in illustration D049NG below, which wind speeds are reported at position A?Not learned 1088. Using the surface analysis in illustration D049NG below, what wind speed is reported in position C?Not learned 1089. The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.Not learned 1090. When utilizing a Pacific Coast chart, which is the reference plane of soundings?Not learned 1091. The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.Not learned 1092. Variation is the angular measurement between which two points?Not learned 1093. Variation is a compass error that you __________.Not learned 1094. Variation is not constant; it is different with every change in __________.Not learned 1095. How is variation indicated on a small-scale nautical chart?Not learned 1096. What will a veering wind do?Not learned 1097. 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 1098. 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 1099. The velocity of a rotary tidal current will be decreased when the Moon is at which phase?Not learned 1100. The velocity of a rotary tidal current will increase when the Moon is at which phase?Not learned 1101. 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 1102. The vertex of a great circle track is in LONG 109°E. Which longitude would an eastbound vessel cross the equator?Not learned 1103. 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 1104. 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 1105. Your vessel is on a course of 221°T at 15 knots. At 0319 a light bears 198.5°T, and at 0353 the light bears 176°T. At what time and distance off will your vessel be when abeam of the light?Not learned 1106. 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 1107. 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 1108. 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 1109. 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 1110. Your vessel is located at position I on the weather map in illustration D013NG below. You should experience which weather condition?Not learned 1111. 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 1112. 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 1113. 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 1114. A vessel heading NW is on a course of __________.Not learned 1115. 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 1116. A vessel heading WNW is on which course?Not learned 1117. 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 1118. 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 1119. When your vessel is on or near the path of an approaching tropical storm the __________.Not learned 1120. 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 1121. 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 1122. 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 1123. 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 1124. 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 1125. 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 1126. 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 1127. 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 1128. 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 1129. 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 1130. 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 1131. 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 1132. 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 1133. 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 1134. A vessel's position should be plotted using bearings of __________.Not learned 1135. 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 014°T, and the variation is 11°E. If the heading of your vessel at the time of the sighting is 009° per standard magnetic compass, what is the correct deviation?Not learned 1136. 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 147°T, and the variation is 5°E. If the heading of your vessel at the time of the sighting is 148° per standard magnetic compass, what is the correct deviation?Not learned 1137. Vessel required to have an Electronic Plotting Aid (EPA) must have a device to indicate the __________.Not learned 1138. Your vessel is steering course 027° per standard magnetic compass (psc), variation for the area is 19°W, and deviation is 2°E. The wind is from the north-northwest, producing a 5° leeway. What true course are you making good?Not learned 1139. When your vessel is on the storm track but behind the storm's center the __________.Not learned 1140. How does visibility change after the passage of a cold front?Not learned 1141. On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.Not learned 1142. In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?Not learned 1143. When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.Not learned 1144. A warm air mass is characterized by __________.Not learned 1145. Warm air masses will generally have __________.Not learned 1146. When a warm air mass overtakes a cold air mass, which term is given to the contact surface?Not learned 1147. As a warm front approaches how does barometric pressure change?Not learned 1148. 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 1149. 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 1150. What weather change accompanies the passage of a cold front in the Northern Hemisphere?Not learned 1151. Which weather element cannot be measured accurately while on board a moving vessel?Not learned 1152. Which weather element cannot be measured accurately while on board a moving vessel?Not learned 1153. Weather forecast messages are usually __________.Not learned 1154. A weather forecast states that the wind will commence backing. What does this indicate if you are in the Northern Hemisphere?Not learned 1155. A weather forecast states that the wind will commence veering. In the Northern Hemisphere, what changes will occur?Not learned 1156. When does a weather front exist?Not learned 1157. On a weather map, what does a large letter "H" indicate?Not learned 1158. Weather observations provided by each weather station include all of the following except which item?Not learned 1159. In a weather report, the term "visibility" expresses __________.Not learned 1160. Weather systems in the middle latitudes generally travel from __________.Not learned 1161. Weather systems in the middle latitudes generally travel in which direction?Not learned 1162. Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?Not learned 1163. 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 1164. Where is the West Wind Drift located?Not learned 1165. What does a white buoy with a blue band signify?Not learned 1166. What does a white buoy with an open-faced orange diamond on it indicate?Not learned 1167. What does a white buoy with an orange circle marked on it indicate?Not learned 1168. What does a white buoy with an orange cross within a diamond marked on it indicate?Not learned 1169. What does a white buoy with an orange rectangle on it indicate?Not learned 1170. What does a white diamond daymark with an orange border indicate?Not learned 1171. White lights may be found on which buoys?Not learned 1172. What do widely spaced isobars on a weather map indicate?Not learned 1173. Wind direction may be determined by observing all of the following EXCEPT __________.Not learned 1174. Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?Not learned 1175. Which wind results from a land mass cooling more quickly at night than an adjacent water area?Not learned 1176. What wind reverses directions seasonally?Not learned 1177. The winds of the "roaring forties" are strongest near which latitude?Not learned 1178. The wind speed and direction observed from a moving vessel is known as __________.Not learned 1179. What does a wind vane on a moving vessel show?Not learned 1180. Why is the wind velocity higher in the dangerous semicircle of a tropical cyclone?Not learned 1181. The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.Not learned 1182. During the winter months, which is TRUE of the southeast trade winds?Not learned 1183. 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 1184. 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 1185. 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 1186. If within 500 yards (460m) of a Northern Right Whale, you are lawfully obligated to take which actions?Not learned 1187. On a working copy of a weather map, a cold front is represented by what color line?Not learned 1188. On a working copy of a weather map what color is the line that represents a warm front?Not learned 1189. Which would you consult for information about the general current circulation in the North Atlantic Ocean?Not learned 1190. Where would you expect to find channels marked with the IALA-A Buoyage System?Not learned 1191. Where would you find information about the time of high tide at a specific location on a particular day of the year?Not learned 1192. Which would be the subject of a NAVAREA warning?Not learned 1193. Yellow lights may appear on which buoys?Not learned 1194. 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 1195. 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 1196. 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 1197. 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 1198. 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 1199. 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 1200. While proceeding up a channel on course 010° per gyrocompass, you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check of the chart shows the range to be 009°T and the variation to be 15°W. If the ship's course is 026°psc, what is the deviation for the present heading?Not learned 1201. 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 1202. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 234°. PSC PGC 030.5° 020° 061.5° 050° 092.0° 080° 122.5° 110° 152.0° 140° 181.0° 170° 210.0° 200° 239.5° 230° 269.0° 260° 298.0° 290° 327.5° 320° 358.5° 350°Not learned 1203. You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2° W. The variation is 8° W. Find the deviation on a magnetic compass heading of 210°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 210.0° 204° 239.5° 234° 269.0° 264° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 1204. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a true heading of 236°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 210.0° 204° 239.5° 234° 269.0° 264° 298.0° 294° 327.5° 324° 358.5° 354°Not learned 1205. You are underway and intend to make good a course of 350°T. You experience a current with a set and drift of 070°T at 1.5 knots, and a westerly wind produces a leeway of 4°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 10 knots. What will be your speed made good over your intended course of 350°T?Not learned 1206. 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 1207. Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?Not learned 1208. Which installed equipment on a towing vessel must be tested and logged when a new Master assumes command?Not learned 1209. Which statement(s) is/are TRUE concerning radio equipment on towing vessels of 26 feet or more in length?Not learned 1210. If the magnetic heading is greater than the compass heading, what direction is the deviation?Not learned 1211. What are the quadrantal spheres used for?Not learned 1212. What is the difference between magnetic heading and compass heading called?Not learned 1213. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 143°.Not learned 1214. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a gyro heading of 037°.Not learned 1215. You are in a channel inbound from sea. A daymark used to mark a channel junction, when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG below?Not learned 1216. You are running parallel to the coast and plotting running fixes using bearings of the same object. You are making more speed than assumed for the running fix. In relation to the position indicated by the fix you will be __________.Not learned 1217. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 039°.Not learned 1218. Under the IALA-A Buoyage System, when entering from seaward which buoy as shown in illustration D046NG below, should be left to port?Not learned 1219. What will a buoy marking a wreck show?Not learned 1220. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 022°. PSC PGC 030.5° 024° 061.5° 054° 092.0° 084° 122.5° 114° 152.0° 144° 181.0° 174° 210.0° 204° 239.5° 234° 269.0° 264° 298.0° 294° 327.5° 324° 358.5° 354°Not learned