Q212 - Navigation General: Oceans, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, where is the center of low pressure located?Not learned 2. How can the accuracy of an azimuth circle be checked?Not learned 3. How are aids to navigation marking the intracoastal waterway (ICW) identified?Not learned 4. When is an air mass termed "warm"?Not learned 5. Aneroid barometers are usually calibrated to indicate atmospheric pressure in which units?Not learned 6. Which term is the angle measured eastward from the vernal equinox along the celestial equator often expressed in time units?Not learned 7. Where can the annual change in variation for an area be found?Not learned 8. Which is another name for Universal time (UTI)?Not learned 9. The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.Not learned 10. What should you apply to a fathometer reading to determine the depth of water?Not learned 11. You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?Not learned 12. What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9.5 GHz?Not learned 13. Which is an area of strong westerly winds occurring between 40°S and 60°S latitude?Not learned 14. To avoid error, how should you read the scale of an aneroid barometer?Not learned 15. What does a barometer showing falling pressure indicate?Not learned 16. Which Beaufort force indicates a wind speed of 65 knots?Not learned 17. The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.Not learned 18. Buoys which mark dredging areas are painted which color?Not learned 19. 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 20. A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water is located in which quadrant?Not learned 21. Which causes the Earth's irregular heating?Not learned 22. What causes variation in a compass?Not learned 23. In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?Not learned 24. What is a characteristic of cardinal marks?Not learned 25. What is characteristic of an isophase light?Not learned 26. Which of the following is a characteristic of a lighted cardinal mark?Not learned 27. Which is a characteristic of a port side daymark?Not learned 28. What is the characteristic of a quick flashing light?Not learned 29. What is a characteristic of a rhumb line?Not learned 30. Which is a characteristic of warm air masses?Not learned 31. On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. Which is TRUE of the red sector?Not learned 32. 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 33. A chart position enclosed by a square is a(n) __________.Not learned 34. On charts of U.S. waters, a magenta marking is NOT used for marking a __________.Not learned 35. How are clouds formed?Not learned 36. What is the name of a cloud of marked vertical development (often anvil-shaped) and produces showers?Not learned 37. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 38. How are Coast Pilots and navigational charts kept corrected and up to date?Not learned 39. When cold air displaces warm air, you have which type of front?Not learned 40. What is the color scheme of navigational marks used for informational or regulatory purposes?Not learned 41. What is a common unit of measure for atmospheric pressure?Not learned 42. The compass rose on a nautical chart indicates both variation and which other information?Not learned 43. Where can complete information on weather broadcasts throughout the world be found?Not learned 44. Which condition exists at the summer solstice in the Northern Hemisphere?Not learned 45. Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?Not learned 46. Which condition would most likely result in fog?Not learned 47. Which winds are consistent winds and blow from the horse latitudes to the doldrums?Not learned 48. By convention, what color is the south pole of a magnet painted?Not learned 49. Which correction(s) must be applied to an aneroid barometer?Not learned 50. In which country would you expect the channels to be marked with the IALA-B Buoyage System?Not learned 51. 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 52. 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 53. Cumulonimbus clouds are formed by __________.Not learned 54. What do cumulus clouds that have undergone vertical development and have become cumulonimbus in form indicate?Not learned 55. In a cyclone, where is the lowest pressure found?Not learned 56. The most dangerous form of icing encountered at sea is formed by which of the following?Not learned 57. Which data must ECDIS be able to record at one-minute intervals?Not learned 58. Where can information about the direction and velocity of rotary tidal currents be found?Not learned 59. Which defines the term relative humidity?Not learned 60. Which defines a wave's fetch?Not learned 61. What describes an accurate position that is NOT based on any prior position?Not learned 62. What describes a flood current?Not learned 63. What does the description "Racon" beside an illustration on a chart mean?Not learned 64. Deviation is the angle between the __________.Not learned 65. The dew point is reached when which condition occurs?Not learned 66. The difference between the heights of low and high tide is the __________.Not learned 67. What is the distance from the bottom of a wave trough to the top of a wave crest?Not learned 68. 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 69. The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.Not learned 70. Which is the dividing meridian between zone descriptions -10 and -11?Not learned 71. How are the doldrums characterized?Not learned 72. When does a Doppler speed log indicate speed over ground?Not learned 73. A Doppler speed log indicates speed through the water __________.Not learned 74. When a dual-purpose marking is used, how should the mariner following the Intracoastal Waterway be guided?Not learned 75. ECDIS must give an alarm for which of the following cases?Not learned 76. ECDIS units incorporate Digital Chart Data that utilizes which formats?Not learned 77. All echo-sounders can measure the __________.Not learned 78. An electronic depth finder operates on which principle?Not learned 79. 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 80. You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate?Not learned 81. While entering a harbor on a course of 225° per gyrocompass, you take a bearing on a pair of range lights and get 220° per gyrocompass. The bearing on the chart is 217°T. The variation for the area is 6°W, and deviation is 2°W. What course would you steer per gyrocompass to make good a true course of 232°?Not learned 82. Entering from seaward, what do triangular-shaped daymarks mark?Not learned 83. The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?Not learned 84. What is the equivalent of 10 min. 52 sec. in arc units?Not learned 85. What is the equivalent of 37 min. 32 sec. in arc units?Not learned 86. How can you estimate the position of a tropical storm's center?Not learned 87. At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?Not learned 88. What does the expression "the air is saturated" mean?Not learned 89. You will find daily information about the duration of slack water in a port on the Atlantic Coast in which publication?Not learned 90. To find a magnetic compass course from a true course what must you apply?Not learned 91. Where do you find the semidiameter correction to be used to correct sextant observations of the stars?Not learned 92. To find the specific phase characteristic of a lighthouse on a sound of the United States you would use which reference?Not learned 93. Fog generally clears when the __________.Not learned 94. How can you follow the approach of a dangerous cyclonic storm?Not learned 95. Which of the following is associated with consistently high barometric pressure?Not learned 96. Which of the following data layer categories is NOT displayed on ECDIS?Not learned 97. Which of the following describes the difference between true heading and magnetic heading?Not learned 98. Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass?Not learned 99. Which of the following is a standard correction applied to the reading of an aneroid barometer?Not learned 100. Freezing salt water spray should be anticipated when the air temperature drops below what temperature?Not learned 101. General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?Not learned 102. The GMT is 0445 and your zone description is +1. What is your zone time?Not learned 103. 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 104. A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?Not learned 105. The greater the pressure difference between a high and a low-pressure center, the __________.Not learned 106. 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 107. What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?Not learned 108. Which handheld instrument is used to measure distances between objects and the ship?Not learned 109. What happens to the intensity of a hurricane as it reaches higher latitudes and cooler waters?Not learned 110. The height of a wave is the vertical distance from which reference points?Not learned 111. In the horizon system of coordinates what is equivalent to the equator on the Earth?Not learned 112. 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 113. Under the IALA-B Buoyage System, which is TRUE of a buoy displaying a red light?Not learned 114. Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.Not learned 115. Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may have which feature?Not learned 116. Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have which of the following?Not learned 117. Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.Not learned 118. Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is in which location?Not learned 119. In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate?Not learned 120. In illustration D044NG below, what type of buoy is indicated by the letter A?Not learned 121. In illustration D045NG below, what two shapes shown are used to indicate a preferred channel?Not learned 122. What is the most important source of information to be used in correcting charts and keeping them up to date?Not learned 123. 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 124. 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 125. 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 126. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?Not learned 127. By what means are indications of the master gyrocompass sent to remote repeaters?Not learned 128. Which information is found in the chart title?Not learned 129. Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?Not learned 130. Which of the sources contains information on Northern Right Whales?Not learned 131. Which information does the outer ring of a compass rose on a nautical chart provide?Not learned 132. An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.Not learned 133. At which interval should a traditional spring driven marine chronometer be rewound?Not learned 134. What do isogonic lines on a chart indicate?Not learned 135. On an isomagnetic chart, which term is used for the line of zero variation?Not learned 136. The largest waves (heaviest chop) will usually develop where the wind blows __________.Not learned 137. What is the length of a nautical mile?Not learned 138. Which light characteristic may be used on a special purpose mark?Not learned 139. 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 140. Which term is given to a light that has a light period shorter than its dark period?Not learned 141. The light rhythm of MorseNot learned 142. Which would you expect to see on a lighted preferred-channel buoy?Not learned 143. What is a lighted safe water mark fitted with to aid in its identification?Not learned 144. Lines drawn through points on the Earth having the same atmospheric pressure are known by which term?Not learned 145. A line of position is __________.Not learned 146. Which list of clouds is in sequence, from highest to lowest in the sky?Not learned 147. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?Not learned 148. Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?Not learned 149. You are in LONG 165°E, zone time at 0400, 1 November. What is the zone time and date in LONG 165°W?Not learned 150. Your longitude is 179°59'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59'E longitude. What is your LMT and date?Not learned 151. Magnets in the binnacles of magnetic compasses are used to reduce which effect?Not learned 152. The magnitude of three stars is indicated. Which star is the brightest?Not learned 153. The magnitude of three stars is indicated. Which star is the brightest?Not learned 154. Which is the main factor that causes the deflection of the southeast trade winds?Not learned 155. 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 156. When making landfall at night, how can you determine if a light is a major light or an offshore buoy?Not learned 157. How many characters does the short text messaging feature of the automatic identification system (AIS) allow for?Not learned 158. How many fixed objects are needed to plot a running fix?Not learned 159. A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has which error?Not learned 160. Which maritime radio system, consisting of a series of coast stations, transmits coastal warnings?Not learned 161. What is the maximum difference between mean time and apparent time?Not learned 162. Which may cause above-normal tides near the center of a hurricane?Not learned 163. Which is TRUE of mean high water?Not learned 164. 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 165. The measurement of local time is based on the passage of the Sun over the __________.Not learned 166. In a microbarograph, when should the pen be checked and the inkwell filled?Not learned 167. In modern fathometers, what produces the sonic or ultrasonic sound waves?Not learned 168. During the month of October, which describes the Sun's declination?Not learned 169. The Moon is farthest from the Earth at __________.Not learned 170. What must change for the compass deviation to change?Not learned 171. Which name is given to the pressure-sensitive element of an aneroid barometer?Not learned 172. What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?Not learned 173. 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 174. On navigational aids, what does the light characteristic "Fl(2+1)" mean?Not learned 175. For navigational purposes, each great circle on the Earth has a length of __________.Not learned 176. 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 177. 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 178. In the Northern Hemisphere, when the center of a high-pressure system is due east of your position, you can expect winds from which direction?Not learned 179. In the Northern Hemisphere, where will the largest waves or swells created by a typhoon or hurricane be located?Not learned 180. In the Northern Hemisphere, an observer at point II in illustration D014NG below, should experience a wind shift from what direction?Not learned 181. In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. Which is the best course of action?Not learned 182. What do the numbers on isobars indicate?Not learned 183. Which observation is NOT used in determining the wind direction?Not learned 184. If an observer in the Northern Hemisphere faces the surface wind, where is the center of low pressure located?Not learned 185. If an observer in the Northern Hemisphere faces the surface wind, where is the center of low pressure located?Not learned 186. 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 187. How often are the time signals broadcast by WWV and WWVH transmitted?Not learned 188. An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?Not learned 189. An orange and white buoy with a rectangle on it displays what information?Not learned 190. When outbound from a U.S. port, what does a buoy displaying a flashing red light indicate?Not learned 191. Which part of a sextant is mounted directly over the pivot of the index arm?Not learned 192. Planetary aberration is due, in part, to __________.Not learned 193. Which term is given to the points where the Sun is at 0° declination?Not learned 194. Which term is used to define the point where the vertical rise or fall of tide has stopped?Not learned 195. Which position includes the effects of wind and current?Not learned 196. A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.Not learned 197. A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.Not learned 198. What is the primary source of the earth's weather?Not learned 199. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?Not learned 200. Which publication requires infrequent corrections?Not learned 201. What is published by the U.S. Coast Guard?Not learned 202. What is the purpose of the "reference hand" on an aneroid barometer?Not learned 203. Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?Not learned 204. Which term is given to a radar display which is oriented, so that north is always at the top of the screen?Not learned 205. What do red sectors of navigation lights warn mariners of?Not learned 206. With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.Not learned 207. IN REGION A of the IALA Buoyage System, when entering from seaward, how would the starboard side of a channel be marked?Not learned 208. 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 209. You have replaced the chart paper in the course recorder. Which statement is TRUE?Not learned 210. What results when warm moist air blows over a colder surface and is cooled below its dew point?Not learned 211. The revision date of a chart is printed on which area of the chart?Not learned 212. Revolution is the __________.Not learned 213. A sailing chart could have which scale?Not learned 214. The Sailing Directions (Enroute) contain information on all of the following EXCEPT which topic of information?Not learned 215. The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT which item?Not learned 216. 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 217. Which is TRUE of a sea breeze?Not learned 218. 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 219. 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 220. Sidereal time is used by navigators when __________.Not learned 221. How will the signal from a ramark show on the PPI?Not learned 222. In which source could you find the number of a chart for a certain geographic area?Not learned 223. In the Southern Hemisphere winds in a low pressure system rotate in which direction?Not learned 224. What is a "Special Warning"?Not learned 225. The speed of sound through ocean water is nearly always __________.Not learned 226. 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 227. When do Spring tides occur?Not learned 228. Which is TRUE concerning the occurrence of Spring tides?Not learned 229. What is the standard atmospheric pressure as measured in inches of mercury?Not learned 230. What is the standard atmospheric pressure in millibars?Not learned 231. What is the standard time meridian for description +12?Not learned 232. The Star Lists in the Nautical Almanac are based on which of the following magnitudes?Not learned 233. Which statement about gyrocompass error is TRUE?Not learned 234. You sight an isolated danger buoy with a white flashing light showing a group of two flashes. The buoy indicates you should take which action?Not learned 235. You are steaming on a course of 246°T at 17 knots. At 2107 you observe a lighthouse bearing 207°T. At 2119 the lighthouse bears 179°T. What is your distance off at the second bearing?Not learned 236. You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, where does the center of low pressure lie?Not learned 237. 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 238. The survey information upon which a chart is based is found at which location?Not learned 239. Swell is the rise and fall of the ocean's surface due to __________.Not learned 240. Which of the symbols shown in illustration D018NG below represents an occluded front?Not learned 241. What is a system of reservoirs and connecting tubes in a gyro compass called?Not learned 242. Which table is NOT found in the U.S. Coast Pilots?Not learned 243. You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?Not learned 244. You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?Not learned 245. 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 246. The term "flood current" refers to that time when the water __________.Not learned 247. Which term is given to the vertical angle between the horizontal and the magnetic line of force?Not learned 248. Which term is used to describe the time interval between successive wave crests?Not learned 249. Which term is used to describe the wind speed and direction observed from a moving vessel?Not learned 250. Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?Not learned 251. Which topmark shown in illustration D023NG below identifies an isolated danger?Not learned 252. On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to voluntary Naval Cooperation and Guidance for Shipping (NCAGS). Where can further information be located?Not learned 253. In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is located in which position?Not learned 254. A tropical storm is a tropical cyclone that generates winds of which speed?Not learned 255. Which is TRUE of an aneroid barometer on a vessel?Not learned 256. Which is TRUE concerning air masses near the earth's surface?Not learned 257. Which is TRUE concerning the characteristics of a warm air mass?Not learned 258. Which is TRUE concerning compass error?Not learned 259. Which is TRUE concerning the flow of air around an anticyclone in the Southern Hemisphere?Not learned 260. Which is TRUE concerning weather information?Not learned 261. Which is TRUE of echo-sounders?Not learned 262. Which is TRUE of a preferred-channel buoy?Not learned 263. When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?Not learned 264. Two well-developed high-pressure areas may be separated by which item?Not learned 265. Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?Not learned 266. Which type of cloud is hail most likely to fall from?Not learned 267. Which type of daymark is used to mark the starboard side of the channel when entering from sea?Not learned 268. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?Not learned 269. Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?Not learned 270. 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 271. 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 272. 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 273. 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 274. 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 275. You are underway on course 127°T. You sight a buoy with the topmarks shown in illustration D025NG below, bearing two points on the starboard bow. Which action must be taken?Not learned 276. You are underway on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. What should you do to ensure that your vessel remains in the best navigable water?Not learned 277. You are underway on course 328°T when you sight a buoy broad on your port bow. Which would indicate that you are in the best navigable water?Not learned 278. You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy has which of the following characteristics?Not learned 279. When using a buoy as an aid to navigation which of the following should be considered?Not learned 280. How can the value of a minor index error of a sextant be determined?Not learned 281. What will a veering wind do?Not learned 282. 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 283. 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 284. 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 285. Your vessel is on course 093°T at 15 knots. At 1835 a light bears 136°T, and at 1857 the same light bears 170°T. What was your distance off the light at 1857?Not learned 286. 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 287. 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 288. 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 289. When your vessel is on or near the path of an approaching tropical storm the __________.Not learned 290. 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 291. 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 292. 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 293. A vessel's position should be plotted using bearings of __________.Not learned 294. 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 196°T, and the variation is 7°E. If the heading of your vessel at the time of the sighting is 192° per standard magnetic compass, what is the deviation?Not learned 295. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation?Not learned 296. A vessel sighting a northern right whale dead ahead should take which action?Not learned 297. Your vessel is steering 283°T at 10 knots. At 0538 a light bears 350°T, and at 0552 the same light bears 002°T. What will be your distance off abeam?Not learned 298. Your vessel is underway on a course of 323.5°T at a speed of 16 knots. At 1945 a light bears 350°T. At 2010 the light bears 008.5°T. What will be your distance off when abeam of the light?Not learned 299. 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 300. In waters where the cardinal system is used where would you expect to find danger?Not learned 301. If your weather bulletin shows the center of a low-pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?Not learned 302. In a weather report, which defines the term "visibility"?Not learned 303. Weather systems in the middle latitudes generally travel in which direction?Not learned 304. Which wind results from a land mass cooling more quickly at night than an adjacent water area?Not learned 305. 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 306. On a working copy of a weather map, a cold front is represented by what color line?Not learned 307. In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.Not learned 308. Where would you expect to find channels marked with the IALA-A Buoyage System?Not learned 309. Where would you expect to find climatological and meteorological tables for the Gulf Coast area?Not learned 310. 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 311. 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 312. 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 313. 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 314. The zenith is the point on the celestial sphere that is __________.Not learned 315. 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 316. Your vessel is proceeding down a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 229°T, and variation is 6°W. If the heading of your vessel at the time of the sighting is 232° per standard magnetic compass, what is the deviation?Not learned 317. Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on which side of the mark?Not learned 318. Which clouds is a thin, whitish, high cloud popularly known as "mares' tails"?Not learned 319. How are cumulonimbus clouds formed?Not learned 320. What does a single line of position combined with a dead-reckoning position result in?Not learned 321. In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 second intervals. Which of the four topmarks shown in illustration D030NG below would be fitted to this buoy?Not learned 322. With regard to GPS, how can a civilian receiver may be capable of achieving the same accuracy as a military receiver?Not learned 323. When is the Moon farthest from the Earth?Not learned 324. Which instrument is designed to maintain a continuous record of atmospheric pressure?Not learned