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Deck · 2,138 questions

General Navigation - USCG Exam Questions

Chart reading, the U.S. Aids to Navigation System, compass error, tides and currents, and the standard navigation publications.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

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All General Navigation questions

Questions 2,001–2,100 of 2,138 · page 21 of 22

  1. #2200 What is the equivalent of 2° 35' in time units?
  2. #2201 You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
  3. #2202 The points where the Sun is at 0° declination are known as __________.
  4. #2203 The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.
  5. #2205 The parallel of latitude at 66°33'N is the __________.
  6. #2206 The parallel of latitude at 23°27'S is the __________.
  7. #2207 What is the equivalent of 4°36' in time units?
  8. #2208 The angle at the pole measured through 180°From the prime meridian to the meridian of a point is known as __________.
  9. #2209 If the Sun's observed altitude is 27°12', the zenith distance is __________.
  10. #2210 If an observer is at 35°N latitude, his zenith is __________.
  11. #2211 90° - Ho = __________.
  12. #2212 If the Sun's observed altitude is 54°30', what is the zenith distance?
  13. #2213 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 lon...
  14. #2214 The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet?
  15. #2215 15° of latitude is equal to __________.
  16. #2216 The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date o...
  17. #2217 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...
  18. #2218 On 16 January, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is -10°C, and the barometer reads 992 milliba...
  19. #2219 What is the equivalent of 0°48' in time units?
  20. #2220 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...
  21. #2221 In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 03°35.5'. Your height of eye is 32 feet and there is...
  22. #2223 The angle measured from the observer's meridian, clockwise or counterclockwise up to 180°, to the vertical circle of the body is the __________.
  23. #2224 The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the...
  24. #2225 What is the equivalent of 83°29.6' in time units?
  25. #2226 What is the equivalent of 1°53' in time units?
  26. #2227 What is the equivalent of 2°52' in time units?
  27. #2228 What is the equivalent of 5°54' in time units?
  28. #2229 What is the equivalent of 10°48' in time units?
  29. #2230 If the GMT is 1500, the time at 75°E longitude is __________.
  30. #2231 You are in LONG 144°E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.
  31. #2232 A ship is in longitude 54°00'W on a true course of 090°. The ship's clocks are on the proper time zone. At what longitude should the clocks be...
  32. #2233 It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE?
  33. #2236 You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
  34. #2237 What is the geographic longitude of a body whose GHA is 232°27'?
  35. #2238 What is the geographic longitude of a body whose GHA is 215°15'?
  36. #2239 A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.
  37. #2240 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...
  38. #2241 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...
  39. #2242 You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?
  40. #2243 You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
  41. #2244 You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
  42. #2245 You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?
  43. #2246 You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
  44. #2247 You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
  45. #2248 You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?
  46. #2249 You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix? -
  47. #2250 You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
  48. #2251 You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
  49. #2252 You take bearings of 313°T and 076°T on two objects. Which bearing of a third object will give the best fix?
  50. #2253 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 mi... illustration
  51. #2254 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 i... illustration
  52. #2256 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 illust... illustration
  53. #2257 You are outbound in a channel marked by a range astern. The range line is 133°T. You are steering 315°T and have the range in sight as shown i... illustration
  54. #2258 You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
  55. #2260 You are on course 226°T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?
  56. #2261 You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  57. #2262 You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?
  58. #2263 You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  59. #2264 You are on course 201°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  60. #2265 You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?
  61. #2266 You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?
  62. #2267 You are on course 061°T. To check the longitude of your vessel you should observe a celestial body on which bearing?
  63. #2268 While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
  64. #2269 While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?
  65. #2270 You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?
  66. #2271 A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
  67. #2272 A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
  68. #2273 A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
  69. #2274 A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?
  70. #2275 A great circle crosses the equator at 17°W. It will also cross the equator at what other longitude?
  71. #2276 A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude?
  72. #2277 The vertex of a great circle track is in LONG 109°E. An eastbound vessel would cross the equator in LONG __________.
  73. #2278 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 LONG __________.
  74. #2279 The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?
  75. #2280 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 nam...
  76. #2281 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...
  77. #2282 The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.
  78. #2283 The steady current circling the globe at about 60°S is the __________.
  79. #2284 When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
  80. #2285 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?
  81. #2286 While steaming on course 280°T, you sight a buoy showing a very quick flashing (VQ) white light well to port. Maintaining course, you sight anothe...
  82. #2287 Which of the following is a characteristic of a lighted cardinal mark?
  83. #2288 While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown in illustration D021NG below, beari... illustration
  84. #2289 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 fla...
  85. #2290 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 b...
  86. #2291 Sometimes foreign charts are reproduced by NGA. On such a chart, a wire-dragged, swept area may be shown in green or __________.
  87. #2292 Which statement is TRUE for an unlighted, red and green, horizontally-banded buoys with the topmost band red?
  88. #2293 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 m...
  89. #2294 On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. How should you pass this buoy?
  90. #2295 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, you should leave the buoy...
  91. #2296 While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take...
  92. #2297 You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions? illustration
  93. #2298 Under the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy is __________.
  94. #2299 Which buoy will NOT display white retro-reflective material?
  95. #2300 In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.
  96. #2301 Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark? illustration
  97. #2302 Aids to navigation marking the intra-coastal waterway can be identified by __________.
  98. #2303 A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015N... illustration
  99. #2304 Which of the Nautical Texts is/are published by the U.S. Coast Guard?
  100. #2305 Civil twilight starts at 1812 zone time on 26 August, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which statement concerning...

General Navigation questions: what to expect

Q How many General Navigation questions are in the Deck pool?

There are 2,138 General Navigation questions on this site, every one released by the U.S. Coast Guard or taken from the National Maritime Center's sample examinations, with its correct answer. The exam draws its General Navigation module from the same pool.

Q What score do I need to pass the General Navigation module?

Most USCG exam modules, including General Navigation, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG General Navigation exam questions?

Yes. They are the published U.S. Coast Guard questions, matched to the National Maritime Center's 2026 sample examinations. Answer any question to see the correct choice, the USCG reference and the illustration where the question uses one.

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About the Deck question pool

The Deck pool holds the current U.S. Coast Guard questions for every deck credential, from Able Seaman and the OUPV six-pack up to unlimited Master. Each question is multiple choice with four options, graded instantly, with the USCG reference shown where one exists.