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Deck · 2,639 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 1,301–1,400 of 2,639 · page 14 of 27

  1. #1392 When using a buoy as an aid to navigation which of the following should be considered?
  2. #1393 What is the equivalent of 1°53' in time units?
  3. #1394 You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?
  4. #1395 Which installed equipment must be tested and logged when a new Master assumes command?
  5. #1396 What is the length of the lunar day?
  6. #1397 You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?
  7. #1398 You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.
  8. #1399 The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, the Moon will be __________.
  9. #1400 A double star is a star that __________.
  10. #1401 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 depre...
  11. #1402 The proper way to approach a downstream lock where there is an outdraft is to be __________.
  12. #1403 Where can information about the currents for the Pacific Coast of the U. S. be obtained?
  13. #1404 In the horizon system of coordinates what is equivalent to the poles on the Earth?
  14. #1405 Which position includes the effects of wind and current?
  15. #1406 Polaris is part of what constellation?
  16. #1408 When using a radar in an unstabilized mode, fixes are determined most easily from __________.
  17. #1409 You are in LONG 144°E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.
  18. #1410 The great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon is the __________.
  19. #1411 Set of the current is __________.
  20. #1412 The angle measured eastward from the vernal equinox along the celestial equator often expressed in time units is the __________.
  21. #1413 You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?
  22. #1414 A phase correction may be applicable to correct the sextant altitude correction of __________.
  23. #1415 Altair is found in what constellation?
  24. #1416 The path that the Sun appears to take among the stars is the __________.
  25. #1417 What is the equivalent of 8 min. 56 sec. in arc units?
  26. #1418 What is the equivalent of 2°52' in time units?
  27. #1419 You are on course 226°T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?
  28. #1420 A towboat is pushing barges ahead at a dangerously fast speed when __________.
  29. #1421 Which statement about an estimated position is TRUE?
  30. #1422 The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.
  31. #1423 At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?
  32. #1424 A first magnitude star is __________.
  33. #1425 When daylight savings time is kept, the time of tide and current calculations must be adjusted. One way of doing this is to __________.
  34. #1426 A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
  35. #1427 Antares is found in what constellation?
  36. #1428 Diurnal aberration is due to __________.
  37. #1429 A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.
  38. #1430 A plane that cuts the Earth's surface at any angle and passes through the center will always form __________.
  39. #1431 The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.
  40. #1432 A great circle will intersect the equator at how many degrees of longitude apart?
  41. #1433 The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
  42. #1434 The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.
  43. #1435 Where will you find information about the duration of slack water?
  44. #1436 What is the relative bearing of an object dead astern?
  45. #1437 Retrograde motion is the __________.
  46. #1438 In the celestial equator system of coordinates what is equivalent to the colatitude of the Earth system of coordinates?
  47. #1439 At morning stars, the first stars that should be observed are those with an azimuth in which quadrant?
  48. #1440 The Star Lists in the Nautical Almanac are based on which of the following magnitudes?
  49. #1441 Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming y...
  50. #1442 A plane perpendicular to the polar axis will never form what line on the Earth's surface?
  51. #1443 Deneb is found in what constellation?
  52. #1444 What is the equivalent of 37 min. 32 sec. in arc units?
  53. #1445 What is the major problem with taking high altitude sun observations?
  54. #1446 When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
  55. #1447 Planetary aberration is due, in part, to __________.
  56. #1448 The magnitude of three stars is indicated. Which star is the brightest?
  57. #1449 What is the relative bearing of an object broad on the starboard bow?
  58. #1450 When does the sidereal day begin?
  59. #1451 A large group of stars revolving around a center is known as a __________.
  60. #1452 A variable star is one that __________.
  61. #1453 What is the relative bearing of an object broad on the starboard quarter?
  62. #1454 A parallax correction is NOT applied to observations of the __________.
  63. #1455 Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?
  64. #1456 A nautical mile is a distance of approximately how much greater than or less than a statute mile?
  65. #1457 15° of latitude is equal to __________.
  66. #1458 In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.
  67. #1459 In the horizon system of coordinates what is equivalent to longitude on the Earth?
  68. #1461 A group of stars which appear close together and form a striking configuration such as a person or animal is a __________.
  69. #1463 You are heading in a northerly direction when you come across an easterly current. Your vessel will __________.
  70. #1464 The prime vertical is the great circle on the celestial sphere that passes through the __________.
  71. #1465 The radius of a circle of equal altitude of a body is equal to the __________.
  72. #1466 The winter solstice is the point where the Sun is at __________.
  73. #1467 The north equatorial current flows to the __________.
  74. #1468 The lunar day is also known as the __________.
  75. #1469 The Milky Way is an example of a __________.
  76. #1470 The phase correction should be applied to sights of Venus and Mars __________.
  77. #1471 The Sun at a maximum declination north would be approximately at __________.
  78. #1472 The points where the Sun is at 0° declination are known as __________.
  79. #1473 The constellation that contains the pointer stars is __________.
  80. #1474 What is the relative bearing of an object broad on the port bow?
  81. #1475 You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect t...
  82. #1476 The period of the Earth's revolution from perihelion to perihelion is the __________.
  83. #1478 Miaplacidus is found in what constellation?
  84. #1479 On 5 July, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?
  85. #1480 If the Sun's observed altitude is 47°50', the zenith distance is __________.
  86. #1481 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...
  87. #1482 In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.
  88. #1483 A semidiameter correction is applied to observations of __________.
  89. #1484 The difference between the DR position and a fix, both of which have the same time, is caused by __________.
  90. #1485 In the horizon system of coordinates what is equivalent to the Greenwich hour angle of the celestial equator system?
  91. #1486 What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage?
  92. #1487 The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.
  93. #1488 The immediate surroundings of what constellation contain the most first magnitude stars?
  94. #1489 What is most likely to happen when you push a multiple tow into a countercurrent?
  95. #1490 The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.
  96. #1491 Towing vessels of more than 39.4 feet in length must carry charts or maps __________.
  97. #1492 Fomalhaut is found in what constellation?
  98. #1493 Bellatrix is found in what constellation?
  99. #1494 You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse?
  100. #1495 The dividing meridian between zone descriptions -4 and -5 is __________.

General Navigation questions: what to expect

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

There are 2,639 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.