Q184 - Navigation Problems: Chart Plot, USCG prep certification 2026

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1. The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.Not learned 2. The following questions are to be answered using Chart 12221 TR, Chesapeake Bay Entrance, and supporting publications. You are on an oceanographic research vessel equipped with standard navigational equipment. The gyro error is 2°W. The maximum draft is 13 feet. Use 10°W variation where required. DEVIATION TABLE Magnetic Heading Deviation 060° 1°W 075° 0° 090° 1°E Chesapeake Channel is temporarily closed to traffic. At 2215 you anchor on the following bearings: Wolf Trap Light: 358°pgc Light "HH": 301°pgc New Point Comfort Spit Light "2": 263°pgc What is your 2215 position?Not learned 3. While you are at anchor, what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position?Not learned 4. What course per gyrocompass would you need to steer from the anchorage to York Spit Channel buoy "29"?Not learned 5. When you get underway, you will take the most direct route to buoy "CBJ", while remaining west of York Spit Channel. You will be turning for 9.7 knots and estimate an average ebb of 0.3 knot during the transit. How long will it take to steam from the anchor position to buoy "CBJ"?Not learned 6. Which of the following describes the area west of your anchorage bounded by the buoys "C51" to "C47A" to "M6" to "M14"?Not learned 7. As you transit the Chesapeake Bay Bridge and Tunnel, you take a gyro bearing of trestle C when it is in line. The gyro bearing was 050°. At that time, the helmsman noted that he was heading 139°pgc and 146° per standard magnetic compass. What is the deviation?Not learned 8. At 1042 you take the following round of bearings: Cape Henry Light 259°T Chesapeake Light 101°T Cape Charles Light 006°T From this position, you set course 070°T What is the course per standard magnetic compass?Not learned 9. At 1126 you take the following set of bearings: Chesapeake Light bears 143°T Cape Henry Light bears 254°T What was the current encountered since your 1042 fix?Not learned 10. You continue on course from your 1126 fix. At 1131 Cape Charles Light bears 322°T. At 1135 you change course to 000°T. At 1149 Cape Henry Light bears 247°T. Which statement concerning your 1149 running fix is TRUE?Not learned 11. The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles and your height of eye is 25 feet, at what approximate distance will you sight the light?Not learned 12. The following questions are to be answered using Chart 12221TR, Chesapeake Bay Entrance, and supporting publications. It is July 13th and you are on a voyage to Baltimore. You are observing daylight savings time. You are turning for 9.8 knots. The maximum draft is 18 feet. The gyro error is 2°E. The visibility is obscured by patchy fog. Use 10°W variation where required. DEVIATION TABLE Magnetic Heading Deviation 315° 1.0°W 330° 0.5°W 345° 0.5°E 000° 2.0°E 015° 3.0°E 030° 1.5°E At 2038 you are on course 272°T when Chesapeake Light is bearing 348° true at a range of 5.3 nm. Based on this fix, which statement is TRUE?Not learned 13. You are proceeding towards the inbound lane of the Chesapeake Bay Entrance Deep Water Route. What is your ETA to abeam of the "CB" buoy?Not learned 14. Your ETA at Chesapeake Bay Bridge and Tunnel between trestles B + C is 2300. If your engine speed is 9.8 knots, what will be your approximate speed over the ground, at that time, allowing for the predicted current?Not learned 15. At buoy "CB" you change course to follow the inbound traffic lane. What is the course to steer per gyrocompass if you correct your heading for a current of 315° at 1.0 knot and allow 3° leeway for northeasterly winds?Not learned 16. At 2216 CBJ Buoy is close abeam to port. Your lookout reports several sound signals with their relative bearings. Which would you judge to be coming from a vessel?Not learned 17. As you enter Chesapeake Bay, visibility improves. At 2235 you are between Chesapeake Channel Buoys "5" and "6" in the 41 foot dredged section of Chesapeake Channel. At that time, you change course to pass between buoys "9" and "10". If buoys "11" and "12" are extinguished, what would be your best leading light to keep you in deep water in the Chesapeake Channel, as you approach the Chesapeake Bay Bridge and Tunnel?Not learned 18. At 2306, as you pass through Trestle "C", you take a gyro bearing of the trestle when it is in line. The bearing is 049.0°. What is the gyro error?Not learned 19. As you proceed up York Spit Channel, what are the three base courses that you must steer to conform to the channel, if steering by standard magnetic compass?Not learned 20. You are abeam of buoy "18" at 2325. What is your ETA at Baltimore if you average 9.5 knots?Not learned 21. The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.Not learned 22. The following questions are to be answered using Chart 12354TR, Long Island Sound - Eastern Part, and supporting publications. Your vessel is enroute to New Haven, CT. You are proceeding at a reduced speed of 9.8 knots on a course of 243°T. Your height of eye is 45 feet and your vessel's deep draft is 33 feet. 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 range of 3.3 miles. What are your present latitude and longitude?Not learned 23. 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 steer to arrive at a point with Buoy "TE" one mile abeam to starboard?Not learned 24. 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?Not learned 25. 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 New Haven Harbor Lighted Whistle Buoy "NH"?Not learned 26. From your 1155 position, you steer a course of 282°T at a speed of 9.5 knots. You obtain the following bearings: 5: Falkner Island Light: 318°T 5: Falkner Island Light: 355°TNot learned 27. 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 time would you expect the New Haven Harbor Outer Range to be in line if you have a current setting 112°T at 1.2 knots?Not learned 28. At the time of your 1245 position, which statement is TRUE?Not learned 29. 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. From this position you set a course to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam. Your speed is 12.5 knots. At 1845 you determine your position to be LAT 41°05.5'N, LONG 73°03.1'W. What were the set and drift of the current?Not learned 30. 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 would you order if you allow for a 2.0 knot current with a set of 180°T?Not learned 31. The Light List shows that a navigational light has a nominal range of 5 miles and a height above water of 21 feet (6.4 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 1.0 mile. At what approximate range will you first sight the light?Not learned 32. The following questions are to be answered using Chart 12354TR, Long Island Sound - Eastern Part, and supporting publications. Your vessel is enroute to New Haven, CT. You are proceeding at a reduced speed of 9.8 knots on a course of 243°T. Your height of eye is 45 feet and your vessel's deep draft is 33 feet. 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 range of 3.3 miles. What are your present latitude and longitude?Not learned 33. 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 steer to arrive at a point with Buoy "TE" one mile abeam to starboard?Not learned 34. 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?Not learned 35. 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 New Haven Harbor Lighted Whistle Buoy "NH"?Not learned 36. 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: 318°T 1225: Falkner Island Light: 355°T Which of the following describes your 1225 running fix?Not learned 37. 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 time would you expect the New Haven Harbor Outer Range to be in line if you have a current setting 112°T at 1.2 knots?Not learned 38. At the time of your 1245 position, which statement is TRUE?Not learned 39. 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. From this position you set a course to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam. Your speed is 12.5 knots. At 1845 you determine your position to be LAT 41°05.5'N, LONG 73°03.1'W. What were the set and drift of the current?Not learned 40. 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 would you order if you allow for a 2.0 knot current with a set of 180°T?Not learned 41. The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.Not learned 42. The following questions are to be answered using Chart 13205 TR, Block Island Sound, and supporting publications. Your vessel is on a course of 090°T at a speed of 14 knots. Your draft is 37 feet, and your height of eye is 56 feet. 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?Not learned 43. If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?Not learned 44. 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°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?Not learned 45. If your fathometer is set on fathoms, what should your fathometer read at 1750?Not learned 46. 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 west of Block Island North Light. With a reported set of 050°T, a drift of 2.0 knots and turning RPMs for 14 knots, which course should you steer to make good your desired course?Not learned 47. At 1844 Watch Hill Point bears 323°T and Block Island North Light bears 084°T. Which statement is TRUE?Not learned 48. 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 Point Judith Light when the Light bears 015°T?Not learned 49. 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 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position?Not learned 50. 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 position?Not learned 51. The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.Not learned 52. The following questions are to be answered using Chart 13205 TR, Block Island Sound, and supporting publications. Your vessel is on a course of 090°T at a speed of 14 knots. Your draft is 37 feet, and your height of eye is 56 feet. 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?Not learned 53. If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?Not learned 54. 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°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?Not learned 55. If your fathometer is set on fathoms, what should your fathometer read at 1750?Not learned 56. 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 west of Block Island North Light. With a reported set of 050°T, a drift of 2.0 knots and turning RPMs for 14 knots, which course should you steer to make good your desired course?Not learned 57. At 1844 Watch Hill Point bears 323°T and Block Island North Light bears 084°T. Which statement is TRUE?Not learned 58. 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 Point Judith Light when the Light bears 015°T?Not learned 59. 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 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position?Not learned 60. 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 position?Not learned 61. The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.Not learned 62. The following questions are to be answered using Chart 13205 TR, Block Island Sound, and supporting publications. Your vessel is on a course of 090°T at a speed of 14 knots. Your draft is 37 feet, and your height of eye is 56 feet. 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?Not learned 63. If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?Not learned 64. 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°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?Not learned 65. If your fathometer is set on fathoms, what should your fathometer read at 1750?Not learned 66. 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 west of Block Island North Light. With a reported set of 050°T, a drift of 2.0 knots and turning RPMs for 14 knots, which course should you steer to make good your desired course?Not learned 67. At 1844 Watch Hill Point bears 323°T and Block Island North Light bears 084°T. Which statement is TRUE?Not learned 68. 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 Point Judith Light when the Light bears 015°T?Not learned 69. 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 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position?Not learned 70. 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 position?Not learned