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Deck · 2,005 questions

Navigation Problems - USCG Exam Questions

Worked chart problems: plotting courses and fixes, time, speed, and distance, set and drift, and compass error corrections.

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 Navigation Problems questions

Questions 601–700 of 2,005 · page 7 of 21

  1. #711 You depart LAT 16°24'S, LONG 169°38'W, for LAT 16°24'S, LONG 174°52'E. What are the course and distance by parallel sailing?
  2. #712 On 21 May at 0630 PDT, (ZD +7), your vessel takes departure at the San Francisco Sea Buoy, LAT 37°45.0'N, LONG 122°41.5'W, enroute to Kobe, LAT 33°52....
  3. #713 On 6 November your vessel's 0706 zone time DR position is LAT 25°30.0'N, LONG 85°35.0'W, when an azimuth of the Sun is observed. The chronometer time...
  4. #714 On 12 September your 0736 zone time DR position is LAT 28°34.0'S, LONG 174°49.0'E. At that time, you observe the Sun bearing 084° per standard magneti...
  5. #715 Your vessel consumes 215 barrels of fuel per day at a speed of 18.0 knots. What will be the fuel consumption of your vessel at 14.0 knots?
  6. #716 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  7. #717 On 28 November your vessel's 0712 zone time DR position is LAT 26°54'S, LONG 45°18'W, when you take an azimuth of the Sun. Determine the gyro error us...
  8. #718 At 0915 zone time on 7 April you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Kobe, LAT 34°40.0'N, LONG 135°12.0'E,...
  9. #719 Determine the great circle distance and initial course from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E.
  10. #720 On 24 May your vessel's 1000 ZT position is LAT 25°36.0'N, LONG 118°39.5'W, when you take an azimuth of the Sun. Determine the gyro error using the az...
  11. #721 On 20 July your vessel's 1626 zone time DR position is LAT 27°13.0'N, LONG 63°42.0'W, when you take an azimuth of the Sun. Determine the gyro error us...
  12. #722 Determine the great circle distance and initial course from LAT 25°50.0'N, LONG 77°00.0'W to LAT 35°56.0'N, LONG 06°15.0'W.
  13. #723 On 31 May your vessel's 1420 zone time DR position is LAT 29°06'N, LONG 120°06'W, when an azimuth of the Sun is observed. The bearing of the Sun per s...
  14. #724 On 1 September your 1115 zone time DR position is LAT 25°20.0'N, LONG 28°24.0'W. At that time, you observe the Sun bearing 160.5°psc. The chronometer...
  15. #725 You are on a voyage from Baltimore, MD to Seattle, WA. The distance from pilot to pilot is 5960 miles. The speed of advance is 16.0 knots. You estimat...
  16. #726 Determine the great circle distance and initial course from LAT 31°57.0'S, LONG 115°52.0'E to LAT 24°47.0'N, LONG 66°59.0'E.
  17. #727 On 27 June your 0734 zone time DR position is LAT 22°14.0'N, LONG 53°52.0'W. At that time, you observe the Sun bearing 069.5°psc. The chronometer read...
  18. #728 On 17 June your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer read...
  19. #729 On 17 May your 1554 zone time DR position is LAT 26°33.0'N, LONG 65°46.0'W. At that time, you observe the Sun bearing 269°psc. The chronometer reads 0...
  20. #730 On 21 April your 1542 zone time DR position is LAT 28°54.0'S, LONG 19°07.0'W. At that time, you observe the Sun bearing 299°psc. The chronometer reads...
  21. #731 The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. The position o...
  22. #732 You have steamed 836 miles at 14.5 knots, and consumed 191 tons of fuel. If you have 310 tons of usable fuel remaining, how far can you steam at 17 kn...
  23. #733 On 17 April your 1610 ZT DR position is LAT 22°07.0'N, LONG 158°16.0'W. At that time, you observe the Sun bearing 271°psc. The chronometer reads 03h 0...
  24. #736 Your vessel will sail from a position in LAT 8°51.0'N, LONG 81°31.0'W to a position at LAT 33°51.5'S, LONG 151°13.0'E. The distance by great circle is...
  25. #738 At 0530 zone time on 20 December, you depart Cape Town (ZD -1). You are bound for New York (ZD +5), and you estimate your speed of advance at 25 knots...
  26. #739 Your vessel consumes 216 barrels of fuel per day at a speed of 15.0 knots. What will be the fuel consumption of your vessel at 17.5 knots?
  27. #743 Determine the distance from LAT 23°24'S, LONG 13°54'E to LAT 23°24'S, LONG 42°48'W, by parallel sailing.
  28. #744 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...
  29. #746 On 11 January your 0450 ZT position is LAT 38°42'N, LONG 14°16'W. You observe Polaris bearing 358.5°pgc. At the time of the observation the helmsman n...
  30. #747 On 3 October your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronomet...
  31. #748 On May 20 your 2300, (ZD +4), DR position is LAT 42°07'N, LONG 81°02'W. At that time, you observe Polaris bearing 012°psc. The chronometer time of the...
  32. #749 On 22 February your 2045 ZT position is LAT 33°19'N, LONG 52°06'W. You observe Polaris bearing 358.1°pgc. At the time of the observation the helmsman...
  33. #750 On 7 December your 0350 ZT position is LAT 35°42'N, LONG 17°38'E. You observe Polaris bearing 359.7°pgc. At the time of the observation the helmsman n...
  34. #751 On 3 October your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman no...
  35. #752 On 19 November your 0146 ZT position is LAT 33°48'N, LONG 25°22'E. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman...
  36. #753 On 23 July your 2100 ZT position is LAT 36°43.0'N, LONG 16°09.8'W, when you observed an azimuth of Polaris to determine the compass error. Polaris bea...
  37. #754 On 11 December your 1816 ZT DR position is LAT 26°30.0'N, LONG 140°35.0'E. At that time, you observe Venus bearing 230°pgc. The chronometer reads 09h...
  38. #755 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...
  39. #756 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  40. #757 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  41. #758 You are planning a voyage from Jacksonville, FL, to the Strait of Gibraltar. Using chart WOXZC 5274, determine which statement is TRUE.
  42. #759 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  43. #760 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 deviati...
  44. #761 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 deviati...
  45. #762 A vessel at LAT 10°22.0'S, LONG 7°18.0'E, heads for a destination at LAT 6°52.0'N, LONG 57°23.0'W. Determine the true course and distance by Mercator...
  46. #763 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 deviati...
  47. #764 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 deviati...
  48. #765 You depart LAT 15°48'N, LONG 174°06'E and steam 905 miles on course 090°. What is the LONG of arrival?
  49. #766 A vessel at LAT 32°14.7'N, LONG 66°28.9'W, heads for a destination at LAT 36°58.7'N, LONG 75°42.2'W. Determine the true course by Mercator sailing.
  50. #767 A vessel at LAT 32°05.0'N, LONG 81°06.0'W, heads for a destination at LAT 35°57.0'N, LONG 5°45.0'W. Determine the distance by Mercator sailing.
  51. #768 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  52. #769 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviati...
  53. #770 While proceeding up a channel on course 010° per gyro compass, you notice a pair of range lights in alignment with the masts of your vessel when viewe...
  54. #771 While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyro...
  55. #772 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...
  56. #773 You are on a voyage from Halifax, Nova Scotia to Galveston, TX. The distance is 2138 miles, and the speed of advance is 12.5 knots. You estimate 18.0...
  57. #774 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...
  58. #775 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...
  59. #776 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...
  60. #777 Determine the great circle distance and initial course from LAT 08°53.0'N, LONG 79°31.0'W to LAT 33°51.5'S, LONG 151°13.0'E.
  61. #778 You are planning a voyage by great circle from LAT 59°00'N, LONG 07°00'W via LAT 38°00'N, LONG 61°30'W. Which of the following statements is TRUE? (Us...
  62. #779 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...
  63. #780 A vessel steams 666 miles on course 295°T from LAT 24°24'N, LONG 83°00'W. What are the latitude and longitude of the point of arrival by mid-latitude...
  64. #781 You depart LAT 50°06.0'N, LONG 153°06.0'E and steam 879 miles on course 090°. What is the LONG of arrival?
  65. #782 Determine the distance from LAT 34°18'S, LONG 172°40'E to LAT 34°18'S, LONG 152°38'E, by parallel sailing.
  66. #783 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...
  67. #784 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...
  68. #785 You depart LAT 28°55.0'N, LONG 89°10.0'W, enroute to LAT 24°25.0'N, LONG 83°00.0'W. What is the true course and distance by mid-latitude sailing?
  69. #786 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...
  70. #787 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...
  71. #788 At 1845 zone time on 24 October, you depart Bimini Island, LAT 25°50.0'N, LONG 77°00.0'W (ZD +5). You are bound for Bishop Rock, LAT 49°40.0'N, LONG 6...
  72. #789 You are planning a voyage from LAT 48°30'N, LONG 125°00'W to Korea via LAT 48°30'N, LONG 153°00'E. Which of the following track lines would you select...
  73. #790 At 0600 zone time on 22 October, you depart Manila, LAT 14°35.0'N, LONG 120°58.0'E (ZD -8). You are bound for Los Angeles, LAT 33°46.0'N, LONG 118°11....
  74. #791 Your vessel departs Montevideo, Uruguay, LAT 34°40.3'S, LONG 54°09.1'W (ZD +4), at 1800 zone time, on 15 October. It is bound for New York, LAT 40°27....
  75. #792 On 21 November at 2100 zone time, you depart LAT 32°12.0'N, LONG 69°26.0'W enroute to LAT 12°05.0'N, LONG 7°32.0'W. The distance is 3,519 miles, and t...
  76. #793 Your vessel departs Arkhangel'sk, from position LAT 64°32'N, LONG 40°31'E at 0236 zone time, on 19 August. It is bound for New York, at position LAT 4...
  77. #795 Your vessel departs Seattle at 1010 zone time, (ZD +8), on 28 May bound for Apra, Guam, (ZD -10). The distance by great circle is 4,948 miles, and you...
  78. #796 You are on a voyage from San Diego, CA to New York, NY. The distance from pilot to pilot is 4860 miles. The speed of advance is 15.0 knots. You estima...
  79. #798 You are on a voyage from Boston, MA to the South Pass, LA. The distance is 1870 miles, and the speed of advance is 13.6 knots. You estimate 16.5 hours...
  80. #799 You are on a voyage from Valdez, AK, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15.0 knots. You esti...
  81. #800 You are on a voyage from Belem, Brazil to Mobile, AL. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You es...
  82. #802 At 0915 zone time on 6 March you depart Sydney, LAT 33°51.5'S, LONG 151°13.0'E (ZD -10). You are bound for Kodiak, LAT 57°47.0'N, LONG 152°25.0'W, and...
  83. #803 At 1200 zone time on 10 October, you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Yokohama, LAT 35°27.0'N, LONG 139...
  84. #804 You are planning a voyage by great circle from Reykjavik (LAT 63°30'N, LONG 24°00'W) to the Azores (LAT 39°30'N, LONG 29°00'W). Which statement is TRU...
  85. #805 On a voyage via the southern tip of Nova Scotia (LAT 43°20'N, LONG 65°35'W) you wish to sail the shortest route to La Coruna, Spain (LAT 43°20'N, LONG...
  86. #806 Your voyage commences off Cape May, NJ, at LAT 38°40'N, LONG 74°00'W, for LAT 44°00'N, LONG 10°00'W. Sea ice is north of 45°N and west of 45°W. Extens...
  87. #807 You are planning a voyage from Cape May (LAT 38°45'N, LONG 74°45'W) to Lisbon (LAT 38°37'N, LONG 09°45'W). Which of the following is TRUE? (Use gnomon...
  88. #808 A great circle track would be most advantageous when compared to the rhumb line track on which route? (Use gnomonic tracking chart WOXZC 5274)
  89. #809 You are planning a voyage from Godthab, Greenland, to Cayenne, French Guiana. Using chart WOXZC 5274, determine which statement is TRUE.
  90. #810 You are planning a voyage by great circle from the mouth of the Delaware River (LAT 38°40'N, LONG 75°00'W) to Lisbon, Portugal. Which statement is TRU...
  91. #811 Your vessel receives a distress call from a vessel reporting her position as LAT 35°01'S, LONG 18°51'W. Your position is LAT 30°18'S, LONG 21°42'W. De...
  92. #812 You are on a voyage from Nome to Honolulu via Unimak Pass (LAT 54°30'N, LONG 164°30'W). The great circle track passes through a point at LAT 38°00'N,...
  93. #813 You are on a voyage via position LAT 44°00'N, LONG 150°00'E to LAT 46°15'N, LONG 124°00'W. Using gnomonic chart WOXZC 5270, determine which statement...
  94. #814 You are planning a voyage from departure Seattle (LAT 48°30'N, LONG 125°00'W) to a position at LAT 44°00'N, LONG 161°00'E. Which statement is TRUE? (U...
  95. #815 Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from Valdez, AK, to Hilo, HI, is TRUE.
  96. #816 Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT...
  97. #817 On which voyage would a great circle track provide a significant savings in distance to steam, when compared to a rhumb line track? (Use gnomonic trac...
  98. #819 Determine the great circle distance and initial course from LAT 37°47.5'N, LONG 122°27.8'W to LAT 33°51.7'S, LONG 151°12.7'E.
  99. #820 Determine the great circle distance and initial course from LAT 33°53.3'S, LONG 18°23.1'E to LAT 40°27.0'N, LONG 73°49.4'W.
  100. #821 Determine the great circle initial course from LAT 29°46.0'S, LONG 30°26.0'E to LAT 31°52.0'S, LONG 115°22.0'E.

Navigation Problems questions: what to expect

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

There are 2,005 Navigation Problems 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 Navigation Problems module from the same pool.

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

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

Q Are these the real USCG Navigation Problems 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.