Q311 - Navigation Problems: Chart Plot, USCG prep certification 2026

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1. The following questions are based on Chart 12221TR, Chesapeake Bay Entrance, and the supporting publications. The draft of your vessel is 9.0 feet (2.75 meters) Gyro error is 2°W Variation is 10°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 1.5°E 030° 2.0°E 060° 1.0°E 090° 0° 120° 1.0°W 150° 1.5°W 180° 2.5°W 210° 1.5°W 240° 1.0°W 270° 0.5°W 300° 0° 330° 0.5°E 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 anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?Not learned 2. Which of the following describes the coast between Great Machipongo Inlet and Cape Charles?Not learned 3. If your engines turn for 6.5 knots, and you encounter a 0.5 knot southerly current, what is your ETA at point A?Not learned 4. What is the course to steer per gyrocompass from the anchorage to point "A" if easterly winds are causing 3° of leeway?Not learned 5. 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, what is the position of your 0320-running fix?Not learned 6. At 0400, you obtain the following information: Sand Shoal Inlet South Light bearing 303° true at 7.1nm What is your 0400 position?Not learned 7. The visibility is about 5 miles. Which statement about Cape Charles Light is TRUE?Not learned 8. Which statement about your 0400 position is TRUE?Not learned 9. 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?Not learned 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. At 0605, Cape Henry Light bears 249°T At 0610, Cape Henry Light bears 248°T At 0625, Cape Henry Light bears 247°T Based on this, you know you are __________.Not learned 11. Which of the following is a characteristic of the abandoned lighthouse at Cape Henry?Not learned 12. Weather broadcasts for the Norfolk area are broadcast on which frequency?Not learned 13. \When Cape Henry Light is abeam, what is the approximate distance to Yorktown?Not learned 14. 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 bears 057° per standard magnetic compass while the vessel is heading 320°T. Which of the following can be determined from this information?Not learned 15. 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 remain in York River Entrance Channel?Not learned 16. The following questions are based on Chart 12221TR, Chesapeake Bay Entrance, and the supporting publications. The draft of your vessel is 9.0 feet (2.75 meters) Gyro error is 2°W Variation is 10°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 1.5°E 030° 2.0°E 060° 1.0°E 090° 0° 120° 1.0°W 150° 1.5°W 180° 2.5°W 210° 1.5°W 240° 1.0°W 270° 0.5°W 300° 0° 330° 0.5°E 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 anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?Not learned 17. Which of the following describes the coast between Great Machipongo Inlet and Cape Charles?Not learned 18. If your engines turn for 6.5 knots, and you encounter a 0.5 knot southerly current, what is your ETA at point A?Not learned 19. What is the course to steer per gyrocompass from the anchorage to point "A" if easterly winds are causing 3° of leeway?Not learned 20. 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, what is the position of your 0320-running fix?Not learned 21. At 0400, you obtain the following information: Sand Shoal Inlet South Light bearing 303° true at 7.1nm What is your 0400 position?Not learned 22. The visibility is about 5 miles. Which statement about Cape Charles Light is TRUE?Not learned 23. Which statement about your 0400 position is TRUE?Not learned 24. 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?Not learned 25. 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. At 0605, Cape Henry Light bears 249°T At 0610, Cape Henry Light bears 248°T At 0625, Cape Henry Light bears 247°T Based on this, you know you are __________.Not learned 26. Which of the following is a characteristic of the abandoned lighthouse at Cape Henry?Not learned 27. Weather broadcasts for the Norfolk area are broadcast on which frequency?Not learned 28. \When Cape Henry Light is abeam, what is the approximate distance to Yorktown?Not learned 29. 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 bears 057° per standard magnetic compass while the vessel is heading 320°T. Which of the following can be determined from this information?Not learned 30. 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 remain in York River Entrance Channel?Not learned 31. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. Your draft is 11 feet (3.3 meters). Gyro error is 3°W Variation is 14°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 2.0°E 030° 1.0°E 060° 0.0° 090° 0.5°W 120° 1.0°W 150° 2.0°W 180° 2.0°W 210° 1.0°W 240° 0.5°W 270° 0.5°E 300° 1.5°E 330° 2.5°E At 0700 Stratford Shoal Middle Ground Light bears 143°pgc at 1.8 miles. What is your 0700 position?Not learned 32. At 0725, Stratford Point Light bears 327°pgc at 3.1 miles. At this time, you wish to change course to 048°T. The current is 135°T at 1.8 knots. Your engine speed is 8 knots. What course must you steer to make good 048°T?Not learned 33. Which structure should you look for while trying to locate Stratford Point Light?Not learned 34. At 0830, you obtain the following radar information: Branford Reef Light bearing 079° true at 4.35 nm What is your vessel's position?Not learned 35. From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 4° leeway. What course should you steer per standard magnetic compass in order to make good your true course?Not learned 36. You make good 097°T from your 0830 fix. With a westerly current of 1.2 knots, what engine speed will you have to turn for from your 0830 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030?Not learned 37. At 0910, your DR position is LAT 41°11.9'N, LONG 72°47.8'W. Your vessel is on course 097°T at 9.5 knots, and the weather is foggy. At 0915, Branford Reef Light is sighted through a break in the fog bearing 318°T. At 0945, Falkner Island Light is sighted bearing 042°T. What is your 0945 running fix position?Not learned 38. What do the dotted lines around Goose Island and Kimberly Reef represent?Not learned 39. At 1100, your position is LAT 41°11.3'N, LONG 72°28.0'W. You are steering a course of 069°T to leave Black Point one mile off your port beam. It has been reported that the Long Sand Shoal Buoys and Hatchett Reef Buoys are off station. What will serve to keep your vessel in safe water and away from these hazards?Not learned 40. Orient Point Light is __________.Not learned 41. At 1210, you are in position LAT 41°14.3'N, LONG 72°16.5'W. What is the charted depth of water?Not learned 42. From your 1210 position, you are making good a course of 083°T. Your engines are turning RPMs for 10 knots. The set and drift of the current are 310° at 1.7 knots. At what time should you expect to enter the red sector of New London Harbor Light?Not learned 43. Your vessel is proceeding up New London Harbor Channel, and you are in line with the range. What would be your course per standard magnetic compass?Not learned 44. New London Harbor is __________.Not learned 45. The distance from New London to the east entrance of the Cape Cod Canal is __________.Not learned 46. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. Your vessel has a draft of 12 feet (3.7 meters) Your height of eye is 24 feet (7.3 meters) Variation is 14°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 0° 030° 1°W 060° 2°W 090° 4°W 120° 2°W 150° 1°W 180° 1°E 210° 2°E 240° 3°E 270° 3°E 300° 2°E 330° 1°E 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"?Not learned 47. 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 if the visibility is 11 miles?Not learned 48. 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 your 2142 position?Not learned 49. What was the speed made good between 2114 and 2142?Not learned 50. 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 New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?Not learned 51. At 0109 you get underway, and at 0112 you take the following bearings: Branford Reef Light: 051° t rue Stratford Point Light: 258° t What is your 0112 position?Not learned 52. At 0112, what is the approximate depth under the keel?Not learned 53. 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?Not learned 54. Branford Reef is __________.Not learned 55. 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 are steering 124°T at 12 knots?Not learned 56. 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 to Twenty-Eight Foot Shoal Lighted Buoy?Not learned 57. 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 and drift from 0130?Not learned 58. What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard?Not learned 59. The shoreline along Rocky Point should give a good radar return because __________.Not learned 60. 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 at the time of the observation. Which statement is TRUE?Not learned 61. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. Your vessel has a draft of 12 feet (3.7 meters) Your height of eye is 24 feet (7.3 meters) Variation is 14°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 0° 030° 1°W 060° 2°W 090° 4°W 120° 2°W 150° 1°W 180° 1°E 210° 2°E 240° 3°E 270° 3°E 300° 2°E 330° 1°E 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"?Not learned 62. 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 if the visibility is 11 miles?Not learned 63. 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 your 2142 position?Not learned 64. What was the speed made good between 2114 and 2142?Not learned 65. 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 New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?Not learned 66. At 0109 you get underway, and at 0112 you take the following bearings: Branford Reef Light: 051° t rue Stratford Point Light: 258° t What is your 0112 position?Not learned 67. At 0112, what is the approximate depth under the keel?Not learned 68. 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?Not learned 69. Branford Reef is __________.Not learned 70. 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 are steering 124°T at 12 knots?Not learned 71. 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 to Twenty-Eight Foot Shoal Lighted Buoy?Not learned 72. 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 and drift from 0130?Not learned 73. What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard?Not learned 74. The shoreline along Rocky Point should give a good radar return because __________.Not learned 75. 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 at the time of the observation. Which statement is TRUE?Not learned 76. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. Your vessel has a draft of 12 feet (3.7 meters) Your height of eye is 24 feet (7.3 meters) Variation is 14°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 0° 030° 1°W 060° 2°W 090° 4°W 120° 2°W 150° 1°W 180° 1°E 210° 2°E 240° 3°E 270° 3°E 300° 2°E 330° 1°E 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"?Not learned 77. 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 if the visibility is 11 miles?Not learned 78. 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 your 2142 position?Not learned 79. What was the speed made good between 2114 and 2142?Not learned 80. 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 New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?Not learned 81. At 0109 you get underway, and at 0112 you take the following bearings: Branford Reef Light: 051° t rue Stratford Point Light: 258° t What is your 0112 position?Not learned 82. At 0112, what is the approximate depth under the keel?Not learned 83. 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?Not learned 84. Branford Reef is __________.Not learned 85. 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 are steering 124°T at 12 knots?Not learned 86. 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 to Twenty-Eight Foot Shoal Lighted Buoy?Not learned 87. 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 and drift from 0130?Not learned 88. What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard?Not learned 89. The shoreline along Rocky Point should give a good radar return because __________.Not learned 90. 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 at the time of the observation. Which statement is TRUE?Not learned 91. The following questions are based on Chart 13205TR, Block Island Sound, and the supporting publications. Your vessel draws 8 feet (2.4 meters) Your height of eye is 20 feet (6.1 meters). Gyro error is 3°E Variation is 15°W "Per standard magnetic compass" is abbreviated "psc" “Per gyrocompass” is abbreviated “pgc” DEVIATION TABLE Magnetic Heading Deviation 000° 1.5°E 030° 2.5°W 060° 2.5°W 090° 2.0°W 120° 1.0°W 150° 0.5°W 180° 0.0° 210° 1.0°E 240° 1.5°E 270° 2.0°E 300° 1.0°E 330° 0.5°W At 0630, you pass Buoy "PI" close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 207°T and Race Rock Light is bearing 072°T. What is your 0654 position?Not learned 92. What is your speed from your 0630 position, with Buoy "PI" close abeam, to your 0654 position?Not learned 93. At 0700, your gyro alarm sounds. What course should you steer by the standard magnetic compass in order to maintain your original heading of 078°T?Not learned 94. 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?Not learned 95. 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 been making since you changed course at 0705?Not learned 96. At 0728, you change course to 080°T. When steady on course, the standard magnetic compass reads 097°. Which statement is TRUE?Not learned 97. At 0748, you take the following bearings: Watch Hill Point Light 020.5° pgc Race Rock Light 269.5° pgc What is the approximate depth of water at this position?Not learned 98. At 0748, you change course to 160°T, speed 10 knots. At what time will you cross the 120-foot curve the first time?Not learned 99. At 0815: Montauk Pt. Light House is bearing 167°T Shagwong Pt. has a radar range of 4.5 miles Cerberus Shoal "9" Buoy is bearing 284°T If the engine is making turns for 10 knots, what was the set and drift of the current since 0748?Not learned 100. Which action should you take to compensate for the above current?Not learned 101. At 0815, visibility is excellent and you can see Montauk Point. Montauk Point has what topographical features?Not learned 102. At 0815, you change course to 079°T and head for the entrance of Great Salt Pond on Block Island. To compensate for a northerly wind, you estimate a 5° leeway is necessary. What course should you steer per gyrocompass to make good 079°T?Not learned 103. 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?Not learned 104. As you head toward Great Salt Pond, visibility is unlimited. At what time will you lose sight of Montauk Pt. Light?Not learned 105. Which chart should you use to enter Great Salt Pond?Not learned