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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 1,901–2,000 of 2,005 · page 20 of 21

  1. #2113 At 0500 zone time on 21 August, your DR position is LAT 47°00'N, LONG 125°15'W. You are steering 000°T at a speed of 9.8 knots. What is the zone time...
  2. #2114 On 22 February your 1857 DR position is LAT 23°46.0'S, LONG 93°16.5'E. You observe an unidentified star bearing 126°T at an observed altitude (Ho) of...
  3. #2115 Your vessel departs Yokohama from position LAT 35°27.0'N, LONG 139°39.0'E (ZD -9), at 1330 ZT on 23 July, bound for Seattle at position LAT 47°36.0'N,...
  4. #2116 The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20...
  5. #2117 At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and...
  6. #2118 Your present position is LAT 41°07.4'N, LONG 72°44.0'W. Assuming that there is no set and drift, what course must you steer per standard magnetic comp...
  7. #2119 You are on course 087° per standard magnetic compass (psc) when you take the following bearings: Falkner Island Light - 022.0°psc Horton Point Light -...
  8. #2120 At 0829 your position is LAT 41°02.9'N, LONG 72°57.4'W. You are making turns for 8.5 knots. What is your ETA at a position midway between buoys "1" an...
  9. #2121 At what time will the first maximum flood occur 1 mile east of Old Field Point on 29 April 1983? (You are keeping daylight saving time ZD +4).
  10. #2122 Your vessel is steady on a heading of 310° per standard magnetic compass when you sight Stratford Point Light and Igor I. Sikorsky Airport Aero Beacon...
  11. #2123 Your engines are making turns for 8 knots and a northerly wind is causing 3° of leeway. There is a current of 220°T at 1.5 knots. What is the course t...
  12. #2124 At 0919 you are in Chesapeake Channel between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel. What is your ETA between York River Ent...
  13. #2125 While in the Back River, you sight the two tanks along the Northwest Branch (vicinity LAT 37°05.6'N, LONG 76°22.0'W) in line bearing 277° per standard...
  14. #2126 What correction should be applied to the charted depths of the Poquoson River at York Point at the PM low water on 18 December 1983?
  15. #2127 At 0856 your GPS position is LAT 37°01.6'N, LONG 75°31.7'W. At 0945 your position is LAT 36°57.0'N, LONG 75°41.0'W. What was the speed made good betwe...
  16. #2128 Your GPS position is LAT 36°59.0'N, LONG 75°48.6'W. What is the course per standard magnetic compass to a position one mile east of Cape Charles Light...
  17. #2129 Your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course to steer per standard magnetic compass to arrive at LAT 36°59.0'N, LONG 75°48.5'W,...
  18. #2130 Local magnetic disturbances of up to how many degrees have been noted from Cape Henry to Currituck Beach Light?
  19. #2131 You are considering anchoring approximately three miles northeast of Chesapeake Light. After examining the chart, you decide not to because of the ___...
  20. #2132 At 0817 your GPS indicates a position of LAT 37°01.6'N, LONG 75°31.7'W. You are on course 182° per standard magnetic compass at a speed of 9.2 knots....
  21. #2133 You are on course 135° per standard magnetic compass when you take the following bearings per standard magnetic compass: Cape Henry Light 266° Cape Ch...
  22. #2134 The soundings on the chart are based on the depth of water available at __________.
  23. #2135 You are on course 027° per magnetic compass when you take the following bearings per magnetic compass: New Point Comfort Spit Light "2" 253° Horn Harb...
  24. #2136 Your 1152 position is LAT 37°23.9'N, LONG 76°05.5'W. You are turning for 10.3 knots. What is your ETA at Trestle C of the Chesapeake Bay Bridge and Tu...
  25. #2137 You sight Wolf Trap Light in line with New Point Comfort Spit Light "2" bearing 040° per standard magnetic compass. You are on course 319° per standar...
  26. #2138 What is the first course per standard magnetic compass (psc) in the outbound southeasterly traffic lane of the Chesapeake Bay entrance traffic separat...
  27. #2139 What is the distance from Norfolk to Philadelphia for a deep draft vessel via the Chesapeake Bay and C and D Canal?
  28. #2140 At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 1950 your position is LAT 36°59.5'N, LONG 75°37.0'W. What is the speed made good?
  29. #2141 What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from...
  30. #2142 On 21 September, you are making up your tow at the fleeting area in Cairo, IL (mile 980.6 Ohio River). You get underway at 0952 enroute to New Orleans...
  31. #2143 What is your ETA at the Memphis Highway Bridge?
  32. #2144 What daymark should you see as you approach Parker Landing Light (mile 924.5 AHP)?
  33. #2145 You pass Morrison Towhead Light (mile 890.5 AHP) at 1723. What was your average speed since leaving Cairo?
  34. #2146 At 1723 you increase speed to make good 9.2 mph at 1937 you have a daymark on your port beam. What daymark is this?
  35. #2147 The charts show a circle with two black quadrants located at mile 846.0 AHP. What does this indicate?
  36. #2148 The Helena Gage reads 9.4 feet. The high point on your towboat is 46 feet above water. What is the vertical clearance when you pass under the Helena H...
  37. #2149 What company does NOT have a marine facility along the riverbank in Helena (mile 658 to 665 AHP)?
  38. #2150 If the Rosedale Gage reads -0.5 feet, what is the water level if the low water reference plane for Rosedale is 3.0 feet?
  39. #2151 Which of the following describes the river at Cypress Bend, mile 569.0 AHP?
  40. #2152 At 0620 on 25 November, you depart Cape Girardeau fleeting area (mile 53.0 UMR) bound for Bisso Towboat Co. Mooring New Orleans, LA, (mile 102.0 AHP)....
  41. #2153 What is the distance to Caruthersville Gage from Cape Girardeau?
  42. #2154 Which dayboard would you see on Puntney Light (mile 943.6 AHP)?
  43. #2155 What is the distance from the Memphis Gage to Elmwood Marine Services Dock in New Orleans, LA.?
  44. #2156 How long will it take you to go from the Memphis Gage to your destination in New Orleans, LA, if you estimate the average current on this segment of t...
  45. #2157 What is the minimum maintained depth of the channel from Cairo to Baton Rouge during low water?
  46. #2158 You see a buoy with red and green bands. What does this buoy indicate?
  47. #2159 As you approach Old River Control Structure Light you see a flashing amber light. Which action should you take?
  48. #2160 What are the dimensions of the Old River Lock?
  49. #2161 At 1710 on 27 November, you are abeam of Kings Point Lt. (mile 439.8 AHP). At this time, you receive a message that there will not be space for you at...
  50. #2162 At 0825 on 08 March, you get underway from the docks at mile 173.0 (AHP), enroute to the docks at mile 179.0 (UMR) in St. Louis, MO, with a tow of eig...
  51. #2163 You are approaching the Baton Rouge R.R. and Hwy 190 Bridge mile 233.9 (AHP). What is the horizontal clearance of the channel span?
  52. #2164 You are turning for 9 mph, approaching Fort Adams Lt. (mile 311.4 AHP) and it is reported that the current at Knox Landing is estimated at 4.5 MPH. Wh...
  53. #2165 At 0715, on March 9, you pass Knox Landing Gage at mile 313.8 (AHP) and estimate the current will average 3.5 mph for the remainder of the time on the...
  54. #2166 What is the vertical clearance between the highest point of your towboat, if it is 45 feet above the water, and if the Natchez Gage reads 23.4 feet wh...
  55. #2167 In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
  56. #2168 As you approach Buckridge Light at mile 412.5 (AHP), which type of daymark would you see on the light structure?
  57. #2169 At 1019, on 10 March, you pass under the Greenville Bridge mile 531.3 (AHP). What was your average speed since departing the docks at mile 173.0 (AHP)...
  58. #2170 As you approach mile 659 (AHP), you notice on the map a dashed line crossing the river at mile 659.9 (AHP). What does this line indicate?
  59. #2171 On which river is New Providence, TN located?
  60. #2172 On the 10th of May at 1130, you leave the fleeting area at Gartness Lt mile 227.8 (AHP) bound for the Monsanto Terminal in St. Louis mile 178.0 (UMR)....
  61. #2173 You estimate the current as 2.5 mph. What is the speed over the ground?
  62. #2174 As you approach 265 (AHP) you notice on the map a circle with 2 black sectors. What does this symbol indicate?
  63. #2175 From Baton Rouge to Cairo, what is the maintained minimum channel depth during low water?
  64. #2176 On which map would you find Redman Point, Arkansas?
  65. #2177 At 1000, on May 11th, you are passing George Prince Lt. mile 364.1 (AHP) in Natchez, Mississippi and must send an ETA to the terminal in St. Louis mil...
  66. #2178 As you approach Ashland Light mile 378.1 (AHP) which daymark would you see?
  67. #2179 What is your clearance as you pass under the Vicksburg Highway 80 Bridge mile 437.8 (AHP) if the Vicksburg Gage reads 14.8 feet and the highest point...
  68. #2180 What is the horizontal width of the main channel span of the Vicksburg Bridge Interstate 20 at mile 437.7 (AHP)?
  69. #2181 At Filter Point Light mile 475 (AHP) there are 3 close straight dashed lines on the map passing through the black dot below the number 475. What do th...
  70. #2182 On 16 October, you depart the mooring facility at mile 233.5 AHP with six loaded tankbarges enroute to a dock in Herculaneum, MO (mile 153.4 UMR). You...
  71. #2183 You estimate the current at 3.0 mph. What is the speed over the ground?
  72. #2184 What is the Federal Project Depth of the channel from Baton Rouge to New Orleans, LA?
  73. #2185 You pass Springfield Bend Lt. (mile 244.8 AHP) at 1242, on 17 October, and estimate the current will average 2.5 mph for the remainder of your trip. W...
  74. #2186 As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads +3.6 feet. If the highest point on your vessel is 62 ft. above the wat...
  75. #2187 What are the color and shape of Togo Island daymark at mile 414.6 AHP?
  76. #2188 At 1227, on 19 October, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mi...
  77. #2189 Which of the following statements regarding aids to navigation shown in the Corps. of Engineers map book is TRUE?
  78. #2190 The Delta-Friar Point revetment on the LMR extends from mile __________.
  79. #2191 What is the distance from Baton Rouge, LA, to St. Louis, MO, on the Mississippi River System?
  80. #2192 At 2345, on 25 December, you depart Memphis Harbor, McKellar Lake (mile 726.0 AHP - LMR) enroute to the Petroleum Fuel & Terminal Co. (144.6 AHP) in A...
  81. #2193 The highest point on your towboat is 67 feet above the water, and the Helena Gage reads +22.3 feet. What is the vertical clearance when you pass under...
  82. #2194 Which of the following statements are TRUE?
  83. #2195 At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Mem...
  84. #2196 What is the distance in river miles, from the new mouth of the White River to the Petroleum Fuel & Terminal Co.(144.6 AHP)?
  85. #2197 The Platte River empties into which river?
  86. #2198 You are downbound, passing by Warfield Point Lt. (mile 537 AHP), when you observe on your Mississippi River map several black lines extending into the...
  87. #2199 As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground if your vessel is making turns for 10....
  88. #2200 As you approach Buckridge Light (mile 412.5 AHP), which type of daymark would you see on the light structure?
  89. #2201 As you approach mile 225 AHP, you notice on the map a broken black line crossing the river at mile 224.2 AHP. What does this line indicate?
  90. #2202 On 14 October 2023, you will be docking at the Southern Branch Elizabeth River, VA at the second high tide. The berth is located between NOAA referenc... illustration
  91. #2203 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...
  92. #2204 (5.8.3.1-43) You are steering 154°pgc. The wind is southwest causing 4° leeway. The gyro error is 3°E, variation is 11°W and deviation is 7°E. What is...
  93. #2205 (5.8.1.5A-4) You are steaming on a course of 208°T at 21 knots. At 2019 you observe a lighthouse bearing 129°T. At 2030 the lighthouse bears 103°T. Wh...
  94. #2206 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...
  95. #2207 Your vessel departs Yokohama from position LAT 35°27.0'N, LONG 139°39.0'E (ZD -9), at 1330 ZT on 23 July, bound for Seattle at position LAT 47°36.0'N,...
  96. #2208 On 3 January you get underway from Cambalick Dock, Morganza, LA, (mile 278.3 AHP) enroute to the Valvoline Pier RDB, (mile 176.3UMR). What is the leng...
  97. #2209 What are the dimensions of the Old River Lock on the Lower Old River (304 AHP)?
  98. #2210 At 2126, you pass Morganza Bend Light (mile 278.4 AHP). At 0122, 4 January, you pass Red River Landing Gage (302.4 AHP). You have been turning for 7.5...
  99. #2211 The Gage at Red River Landing reads 22.2 feet. The low water reference plane for Red River is 10.6 feet. How many feet is this above the low water ref...
  100. #2212 The river will be temporarily closed to navigation at mile 531.3 AHP due to repairs to the bridge. This will occur at 1300, 5 January, and last for si...

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.