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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 1,701–1,800 of 2,005 · page 18 of 21

  1. #1913 Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and distan...
  2. #1914 Your vessel is on a course of 034°T at 17 knots. At 0551 a light bears 056.5°T, and at 0623 the light bears 079°T. At what time and distan...
  3. #1915 Your vessel is on a course of 107°T at 16 knots. At 0403 a light bears 129.5°T, and at 0426 the light bears 152°T. At what time and distan...
  4. #1916 You are steering a course of 316°T, and a light bears 34° on the port bow at 2053. At 2126 the same light bears 68° on the port bow, and y...
  5. #1917 You are at anchor in the anchorage at the entrance to Delaware Bay. You weigh anchor at 1445 DST (ZD +4) on 24 July 1983 and proceed northbound enrout...
  6. #1918 Your vessel is at the approaches to Savannah, GA, with the wind coming out of the west. What will be the approximate direction of the wind-driven curr...
  7. #1919 If the height of the tide at low water is 0.0 feet, the range is 9.0 feet, and the duration is 06h 00m. What is the height of the tide 02h 12m before...
  8. #1920 What is the mean tide level at Peaks Island, ME?
  9. #1921 At 1705: Race Rock Light bears 099°True, Orient Point Light bears 176°True, Bartlett Reef Light bears 083°True. What is your vessel's position?
  10. #1922 If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?
  11. #1923 At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°T. At 1750 Race Rock Light bears 336...
  12. #1924 If your fathometer is set on fathoms, what should your fathometer read at 1750?
  13. #1925 At 1756 you determined your vessel's position to be 41°10.4'N, 71°59.2'W. From this position, you wish to change course to head for a point 5 miles we...
  14. #1926 At 1844 Watch Hill Point bears 323°T and Block Island North Light bears 084°T. Which statement is TRUE?
  15. #1927 From your 1850 position of 41°12.8'N, 71°44.1'W, you change course to 060°T. If you make the course good, what will be your predicted distance off Poi...
  16. #1928 You are making good a course of 060°T at a speed of 13.5 knots. At 1855 Block Island North Light bears 086°T; at 1910 Block Island North Light bears 1...
  17. #1929 At 1942 Point Judith bears 030°T and has a range of 3.6 miles and Sandy Point has a range of 5.3 miles. What was your speed made good from your 1850 p...
  18. #1930 On 2 October 2023, you will be docking at the Dundalk Marine terminals in Baltimore, MD at the first high tide. The berth is located between NOAA refe... illustration
  19. #1931 On 10 November 2023 at 0130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). What is the direction and velocity of the current you... illustration
  20. #1932 On 18 May your 1030 ZT DR position is LAT 18°30'N, LONG 62°31'W. You are on course 286°T, speed 24 knots. Determine your 1200 position using the follo...
  21. #1933 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...
  22. #1934 On 14 March at 1845 ZT, you take a sextant observation of Polaris. Your DR position is LAT 29°10'N, LONG 154°30'W, and your sextant reads 29°53.5'. Yo...
  23. #1935 You observe the lower limb of the Sun at a sextant altitude (hs) of 34°51.4' on 18 October. The index error is 2.0' off the arc. The height of eye is...
  24. #1936 On 20 November your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bo...
  25. #1937 On 3 February your 0451-zone time DR position is LAT 24°15.0'S, LONG 124°24.0'W. Considering their magnitude, azimuth and altitude, which group includ...
  26. #1938 You are planning a voyage by great circle to Reykjavik, Iceland, via Cape Race, Newfoundland, LAT 46°30'N, LONG 53°00'W. Which statement is TRUE? (Use...
  27. #1939 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.
  28. #1940 Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same...
  29. #1941 On 10 July your 0930-zone time DR position is LAT 26°31.0'S, LONG 4°41.0'E. Your vessel is on course 308°T at a speed of 22.0 knots. What is the zone...
  30. #1942 On 5 June your 0420-zone time DR position is LAT 26°47.0' N, LONG 133°19.5' W. At that time, you observe Vega bearing 298.1°psc. The chronometer reads...
  31. #1943 Determine the distance from LAT 63°54.0'N, LONG 04°52.0'E to LAT 63°54.0'N, LONG 18°24.0'W by parallel sailing.
  32. #1944 At 0610, you take the following observations: Point Judith Light – 010°pgc Point Judith Harbor of Refuge Main Breakwater Center Light – 297°pgc Point...
  33. #1945 Which of the following best describes Point Judith Harbor of Refuge?
  34. #1946 At 0610 you are on a course 240°pgc at 15kts. What is the course per standard magnetic compass?
  35. #1947 Which of the following describes the bottom in the vicinity of 1nm due West(270°T) of your position?
  36. #1948 Your meteorological visibility is 5.5 nautical miles. At what distance will you be able to sight Point Judith Light(20M)?
  37. #1949 At what time will you cross the 60-foot curve if you are steering 240°pgc and making good 15 knots?
  38. #1950 What do the two wavy magenta lines running to Green Hill Point represent?
  39. #1951 At 0650 you take the following bearings: Point Judith Light bearing 059°pgc Block Island North Light bearing 139°pgc What is your 0650 position?
  40. #1952 What was the current, if any, between 0610 and 0650?
  41. #1953 From your 0650 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0nm if a Northerly wind is producing 3°...
  42. #1954 At 0725, Watch Hill Point (left tangent) bears 314.5°T at 3.0nm. What was the speed made good between 0650 and 0725?
  43. #1955 At 0745, you take the following bearings: Watch Hill Light 031.0°pgc Latimer Reef Light 329.0°pgc Race Rock Light 264.0°pgc What is the course made go...
  44. #1956 At 0745, you change course to head for The Race. You intend to leave Race Rock Light bearing due North(000°T) at 0.5nm. If the current is 110°T at 3.5...
  45. #1957 You are bound for New London. With Race Rock Light bearing due North(000°T), which of the following is correct?
  46. #1958 In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 075°pgc. The helmsman was steering 302...
  47. #1959 On 9 November 2023 at 1630, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). What is the direction and velocity of the current you a... illustration
  48. #1960 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...
  49. #1961 On 5 October 2023, you will be docking at the Redwood Marine Terminal in Eureka, CA at the first high tide. The berth is located between NOAA referenc... illustration
  50. #1962 On 31 October your 1700 zone time DR position is LAT 27°17.0'N, LONG 116°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the...
  51. #1963 You are on a voyage from Limoy, Costa Rica to Los Angeles, CA. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knot...
  52. #1964 You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes followed by a 9 second silent...
  53. #1965 If the speed necessary for reaching port at a designated time is 12.6 knots and the pitch of the propeller is 13.6 feet, how many revolutions per minu...
  54. #1966 On 12 June at 0919 zone time, your position is LAT 26°52'N, LONG 84°34'W. The chronometer reads 03h 17m 00s. Chronometer error is 01m 40s slow. At tha...
  55. #1967 On 10 August your 0430 ZT position is LAT 29°56.7'S, LONG 139°11.0'E. Your course is 321°T, speed 18.2 knots. You observed 3 celestial bodies. Determi...
  56. #1968 A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answe...
  57. #1969 At 2000 Hog Island Lighted Bell Buoy "12" bears 199°T and Buoy "GM" bears 249°T. What is your position?
  58. #1970 From your 2000 position you change course to 206°T. What time would you expect to be abeam of Hog Island Buoy "12"?
  59. #1971 You should expect to pass how far off buoy "12"?
  60. #1972 At 2030 you take the following bearings: Sand Shoal Inlet South Light - 275°T Cape Charles Light - 235°T What is the set and drift from 2000 to 2030?
  61. #1973 From your 2030 fix you change course to 195°T and leave the engine speed at 14 knots. At 2045, your position is Lat 37°13.50'N Long 075°38.05'W. Which...
  62. #1974 You continue to steer 195°T. You pass Cape Charles Lighted Bell Buoy "14", 0.9 miles abeam to starboard at 2111. What is your speed made good from 204...
  63. #1975 What is your course made good from 2045 to 2111?
  64. #1976 If you are going to head directly for Chesapeake Light from your 2111 fix, what is the course to make good?
  65. #1977 At 2200, you alter course to 204°T, at 14 knots. You expect a current on this leg of the trip, setting 325° at 1.5 knots. Which course should you stee...
  66. #1978 On 10 November 2023 at 2130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transit 15nm and make good 12.5 knots... illustration
  67. #1979 On 4 October 2023, you will be docking at Redwood Marine Terminal in Eureka, CA at the first high tide. The berth is located between NOAA reference ti... illustration
  68. #1980 On 20 November your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bo...
  69. #1981 In which situation does a great circle track provides the maximum saving in distance?
  70. #1982 On 26 July your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the foll...
  71. #1983 While proceeding up a channel on course 010° per gyrocompass, you notice a pair of range lights in alignment with the masts of your vessel when viewed...
  72. #1984 A vessel at LAT 20°00'N, LONG 107°30'W is to proceed to LAT 24°40'N, LONG 112°30'W. What is the course and distance by mid-latitude sailing?
  73. #1985 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...
  74. #1986 In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. What does this difference represent?
  75. #1987 At 0630, Buoy "PI" is close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull I...
  76. #1988 What was the course made good from 0630 to 0654?
  77. #1989 What course should you steer by the standard magnetic compass in order to maintain a heading of 081°pgc?
  78. #1990 At 0705, you change course to 096°T. At this time, Race Rock Light is bearing 000°T at 0.35 mile. You are now governed by which Navigation Rules?
  79. #1991 At 0728, Race Rock Light is bearing 282°T at 3.8 miles, and the closest point on Fishers Island has a radar range of 2.1 miles. What speed have you be...
  80. #1992 At 0727, the cupola on Fishers Island is in line with Latimer Reef Light bearing 024°pgc. Based on this information what is the gyro error?
  81. #1993 At 0748, you take the following bearings: Watch Hill Point Light bearing 026.5°pgc Race Rock Light bearing 275.5°pgc What is the approximate depth of...
  82. #1994 At 0748, you change course to 160°T, speed 10 knots. At what time will you cross the 120-foot curve the first time?
  83. #1995 At 0815, Montauk Pt. Light House is bearing 172°T, Shagwong Pt. has a radar range of 4.5 miles. If the engine was making turns for 10 knots, what was...
  84. #1996 Which action should you take to compensate for the above current?
  85. #1997 At 0815, visibility is excellent and you can see Montauk Point. Montauk Point Light is __________.
  86. #1998 At 0815, you change course to 079°T. To compensate for a southerly wind, you estimate a 3° leeway is necessary. Which course should you steer per stan...
  87. #1999 At 0839, Montauk Pt. Light is bearing 205°T at a radar distance of 6.6 miles. What is your speed made good from your 0815 position?
  88. #2000 The area between Block Island and Montauk Point is bounded by dashed magenta lines. What does this represent?
  89. #2001 Which chart should you use to enter Great Salt Pond?
  90. #2002 On 4 October 2023, you will be docking at the Redwood Marine Terminal in Eureka, CA at the first low tide. The berth is located between NOAA reference... illustration
  91. #2003 (5.4.2.3B-10) A vessel steams 666 miles on course 135°T from LAT 40°24.0'N, LONG 74°30.0'W. What is the latitude and longitude of the point of arrival...
  92. #2004 (5.6.3-16) If the speed necessary for reaching port at a designated time is 23.7 knots and the pitch of the propeller is 20.8 feet, how many revolutio...
  93. #2005 On 6 April your 0300 DR position is LAT 27°42'S, LONG 128°58'W. You are on course 097°T at a speed of 18 knots. You observed 3 celestial bodies. Deter...
  94. #2006 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?
  95. #2007 You are turning for 7.5 knots and a westerly wind is causing 2° of leeway. There is a current of 047°T at 1.2 knots. What course should you steer betw...
  96. #2008 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...
  97. #2009 What do the broken magenta lines starting at Montauk Point and running generally ENE to Block Island indicate?
  98. #2010 The Ruins (LAT 41°08.5'N, L0NG 72°08.8'W) is __________.
  99. #2011 Your position is LAT 41°15.2'N, LONG 71°50.1'W at 1347. You are turning for 6.9 knots. What is your ETA at Shagwong Reef Buoy "7SR"?
  100. #2012 Which of the following describes Point Judith Harbor of Refuge (LAT 41°22'N, LONG 71°30'W)?

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.