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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 1,801–1,900 of 2,005 · page 19 of 21

  1. #2013 At 1016 your position is LAT 41°07.6'N, LONG 71°38.5'W. At 1116 your position is LAT 41°01.4'N, LONG 71°29.4'W. What was the course made good between...
  2. #2014 You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc...
  3. #2015 You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 089° per standard magnetic compass. If y...
  4. #2016 At 1516 your position is LAT 41°11.3'N, LONG 71°48.6'W. You are on course 300° per standard magnetic compass at 9.4 knots. At 1600 your position is LA...
  5. #2017 At 0100 zone time on 23 September your DR position is LAT 24°25.0'N, LONG 83°00.0'W. You are steering course 315°T. The speed over the ground is 10.0...
  6. #2018 On 16 July at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant...
  7. #2019 Your 0745 ZT 15 July position is LAT 29°04.0'N, LONG 71°17.5'W. You are on course 165°T, and your speed is 8.0 knots. You observed 3 morning sun lines...
  8. #2020 At 0100 zone time on 23 September your DR position is LAT 24°25.0'N, LONG 83°00.0'W. You are steering course 315°T. The speed over the ground is 10.0...
  9. #2021 You depart LAT 33°45.0'N, LONG 118°30.0'W, and steam 2216 miles on course 250°T. What is the longitude of your arrival by Mercator sailing?
  10. #2022 On 29 July your 1930 zone time DR position is LONG 164°26.0'E. At that time, you observe Polaris with a sextant altitude (hs) of 23°46.8'. The chronom...
  11. #2023 A line of position from a celestial observation is a segment of which choice?
  12. #2024 On 13 August your 0345 ZT DR position is LAT 21°35.0'N, LONG 135°26.0'W. You are on course 052°T at a speed of 14 knots. What will be the zone time of...
  13. #2025 Revolution is the __________.
  14. #2026 On 14 October your 0800 zone time (ZT) dead reckoning position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 kn...
  15. #2027 At 1016 your position is LAT 41°07.6'N, LONG 71°38.5'W. At 1116 your position is LAT 41°01.4'N, LONG 71°29.4'W. What was the course made good between...
  16. #2028 You are on course 056° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 193° pe...
  17. #2029 Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive one mile due south of Block Island Southeast Point Lig...
  18. #2030 At 1103 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at light "1" at the mouth of the appro...
  19. #2031 The Ruins (LAT 41°08.5'N, L0NG 72°08.8'W) is __________.
  20. #2032 At 1516 your position is LAT 41°11.3'N, LONG 71°48.6'W. You are on course 300° per standard magnetic compass at 9.4 knots. At 1600 your position is LA...
  21. #2033 Which of the following describes the passage between Great Gull Island and Plum Island?
  22. #2034 What do the broken magenta lines starting at Montauk Point and running generally ENE to Block Island indicate?
  23. #2035 You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position one-mile due south of Block Island Sou...
  24. #2036 You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc...
  25. #2037 According to the U.S. Coast Pilot, what is the depth of the channel between State Pier No. 1 and the U.S. Navy Submarine Base in New London Harbor?
  26. #2038 At 2245 your GPS position is LAT 41°01.75'N, LONG 72°48.40'W. You are steering course 086° per standard magnetic compass at a speed of 6.0 knots. At 2...
  27. #2039 At 2115 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 0015 your position is LAT 41°03.3'N, LONG 72°37.9'W. What was your true course made good?
  28. #2040 At 1815 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT...
  29. #2041 You are on course 262° per standard magnetic compass when you take the following bearings: Saybrook Breakwater Light - 338.5°psc Little Gull Island Li...
  30. #2042 Your vessel is steady on a heading of 160° per standard magnetic compass when you sight Southwest Ledge Light and New Haven Outer Channel Range Rear L...
  31. #2043 NOAA Weather Broadcasts for the New London area may be received by turning your radio to which of the following frequencies?
  32. #2044 You are planning to anchor your vessel at LAT 41°01.1'N, LONG 73°02.8'W. What type of bottom should you expect at this position?
  33. #2045 What course should you steer by your standard magnetic compass (psc), between New Haven Light and Stratford Pt. Light, if the set and drift of the cur...
  34. #2046 Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming that there are no set and drift, what course must you steer per standard magnetic com...
  35. #2047 What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT...
  36. #2048 On 10 November 2023 at 0630, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transit 15nm and make good 12.5 knots... illustration
  37. #2049 On 15 October 2023, you will be docking on the Southern Branch Elizabeth River, VA at the first high tide. The berth is located between NOAA reference... illustration
  38. #2050 On 31 July, you are anchored at LAT 37°22.4'N, LONG 75°39.9'W. You get underway at 0240 enroute to Yorktown, VA. What is the course psc from the ancho...
  39. #2051 Which of the following describes the coast between Great Machipongo Inlet and Cape Charles?
  40. #2052 If your engines turn for 6.5 knots, and you encounter a 0.5 knot southerly current, what is your ETA at point A?
  41. #2053 What is the course to steer per gyrocompass from the anchorage to point "A" if easterly winds are causing 3° of leeway?
  42. #2054 At 0250, Great Machipongo Inlet Light "5" (37°21.8'N, 75°43.7'W) bears 279°pgc. At 0320, the light bears 320° pgc. If you are making good 6.5 knots, w...
  43. #2055 At 0400, you obtain the following information: Sand Shoal Inlet South Light bearing 303° true at 7.1nm What is your 0400 position?
  44. #2056 The visibility is about 5 miles. Which statement about Cape Charles Light is TRUE?
  45. #2057 Which statement about your 0400 position is TRUE?
  46. #2058 At 0405, you increase speed. At 0500, your position is LAT 37°06.0'N, LONG 75°41.1'W. What is the approximate depth of the water under the keel?
  47. #2059 (5.8.2.3B13-10) At 0600, you are entering the inbound leg of the traffic separation scheme at position LAT 36°59.2'N, LONG 75°47.6' W. Course is 250°T...
  48. #2060 Which of the following is a characteristic of the abandoned lighthouse at Cape Henry?
  49. #2061 Weather broadcasts for the Norfolk area are broadcast on which frequency?
  50. #2062 When Cape Henry Light is abeam, what is the approximate distance to Yorktown?
  51. #2063 As you pass between trestle "B" and trestle "C" of the Chesapeake Bay Bridge - Tunnel, you sight along the trestle "C" when it is in line. The trestle...
  52. #2064 The wind is easterly and will cause 2° of leeway. The current is 180° at 0.5 knot. If your engines are turning for 8.0 knots, what should you steer to...
  53. #2065 On 5 October 2023, you will be docking at the Redwood Marine Terminal in Eureka, CA at the second high tide. The berth is located between NOAA referen... illustration
  54. #2066 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 deviatio...
  55. #2067 A vessel steams 1650 miles on course 077°T from LAT 12°47'N, LONG 45°10'E. What is the latitude and longitude of the point of arrival by Mercator sail...
  56. #2068 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...
  57. #2069 At 0930 you obtain a position from the following information: Race Rock Light bears 110°T at a range of 1.4 miles, and Goshen Point bears 330°T at a r...
  58. #2070 At 1000 buoy "PI" is abeam to starboard a distance of 0.5 mile. From this position, with a set of 295° and a drift of 1.6 knots, what course must you...
  59. #2071 At 1130, Horton Point Light bears 172°T at a range of 3.45nm. The fathometer reads 81 ft. Which of the following describes your position?
  60. #2072 At 1155 your vessel's position is LAT 41°09.0'N, LONG 72°34.4'W. If you make good a course of 282°T and a speed of 10.0 knots, when will you arrive at...
  61. #2073 From your 1155 position, you steer a course of 282°T at a speed of 9.5 knots. You obtain the following bearings: 1205: Falkner Island Light bears 318°...
  62. #2074 At 1245 the GPS shows your position to be LAT 41°10.3'N, LONG 72°44.2'W. You are steering a course of 284°T at an engine speed of 13.0 knots. At what...
  63. #2075 At the time of your 1245 position, which statement is TRUE?
  64. #2076 After departing the New Haven terminals, your 1800 position puts the New Haven Harbor Lighted Whistle Buoy "NH" bearing 130°T at a range of 0.2 mile....
  65. #2077 From your 1845 position, you desire to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam at 1900. Which course and speed woul...
  66. #2078 On 15 October 2023, you will be docking on the Southern Branch Elizabeth River, VA at the second low tide. The berth is located between NOAA reference... illustration
  67. #2079 On 9 November 2023 at 1130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transit 15nm and make good 10.0 knots... illustration
  68. #2080 On 13 August your 0345 ZT DR position is LAT 21°35.0'N, LONG 135°26.0'W. You are on course 052°T at a speed of 14 knots. What will be the zone time of...
  69. #2081 On 15 November your 1030 ZT DR position is LAT 19°41'S, LONG 41°37'W. You are on course 239°T, speed 22 knots. Determine your 1200 position using the...
  70. #2082 Your position is LAT 40°59.0'N, LONG 73°06.2'W. What is the course psc to New Haven Harbor Lighted Whistle Buoy "NH"?
  71. #2083 You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time will you sight New Haven Light...
  72. #2084 At 2142, you take the following bearings: Stratford Point Light 331°T Stratford Shoal Middle Ground Light 280°T Old Field Point Light 223°T What is yo...
  73. #2085 What was the speed made good between 2114 and 2142?
  74. #2086 At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off...
  75. #2087 At 0109 you get underway, and at 0112 you take the following bearings: Branford Reef Light bearing 051° true Stratford Point Light bearing 258° true W...
  76. #2088 At 0112, what is the approximate depth under the keel?
  77. #2089 At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at 1.2 knots?
  78. #2090 Branford Reef is __________.
  79. #2091 At 0112, the radar range to Branford Reef Light is 2.9 miles. At 0125, the range is 3.6 miles. What is the position of your 0125 running fix if you ar...
  80. #2092 At 0130, your position is LAT 41°09.3'N, LONG 72°46.9'W when you change course to 086°T. If you make good 086°T, what is the closest point of approach...
  81. #2093 At 0200, you take the following bearings: Falkner Island Light 004.5°T Kelsey Pt. Breakwater Lt. 054.0°T Horton Point Light 115.0°T What were the set...
  82. #2094 What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard?
  83. #2095 The shoreline along Rocky Point should give a good radar return because __________.
  84. #2096 You sight Bartlett Reef Light in line with New London Harbor Light bearing 043°pgc. You are heading 088°pgc and 098.5° per standard magnetic compass a...
  85. #2097 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 deviatio...
  86. #2098 At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diamet...
  87. #2099 You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PPE" repeated several times follo...
  88. #2100 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 distance by Mercator sailing.
  89. #2101 On 14 January your 0746 zone time DR position is LAT 26°37.0'N, LONG 153°19.0'W. At that time, you observe the Sun bearing 123°psc. The chronometer re...
  90. #2102 You are steering 142°pgc to make good your desired course. The gyro error is 1°E. The variation is 8°W. What should you steer by standard magnetic com...
  91. #2103 You are turning 93 RPM, with a propeller pitch of 25 feet, and an estimated slip of 0%. What is the speed of advance?
  92. #2104 On 16 April your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bo...
  93. #2105 Determine the great circle distance and initial course from LAT 08°36.0'N, LONG 126°17.0'E to LAT 02°12.0'S, LONG 81°53.0'W.
  94. #2106 On 16 July your 1810 zone time DR position is LAT 24°16.5'S, LONG 162°52.0'E. Considering their magnitude, azimuth, and altitude, which group includes...
  95. #2107 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...
  96. #2108 You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?
  97. #2109 On 13 October at 1847 ZT, your vessel's DR position is LAT 42°17.4' N, LONG 138°46.2' W. At approximately this time, you obtain a sextant altitude (hs...
  98. #2110 A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?
  99. #2111 On 22 February your 0800 zone time position is LAT 24°16'S, LONG 95°37'E. Your vessel is on course 126°T at a speed of 14 knots. An observation of the...
  100. #2112 You observe the lower limb of the Sun at a sextant altitude (hs) of 31°31.5' on 6 March. The index error is 2.5' on the arc. The height of eye is 76 f...

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.