Q421 - Navigation Problems: Chart Plot, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?Not learned 2. The following questions are to be answered using chart 12221 TR, Chesapeake Bay Entrance, and supporting publications. Your vessel is enroute from New York, NY, to Baltimore, MD. Your vessel's draft is 29 feet, and your height of eye is 54 feet. Your present course is 206°T and your speed is 18 knots. Use 10°W variation where required. At 0705 your position is Latitude 37°20.8' N Longitude 75°29.9' W. If a northwesterly breeze is causing 3 degrees leeway what is the true course to steer in order to pass Hog Island Lighted Bell Buoy "12" at a distance abeam of two miles?Not learned 3. At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206°T and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?Not learned 4. (5.8.2.2B1-3) At about what time will you see Chesapeake Light if visibility is exceptionally clear?Not learned 5. At 0741 you are still steering a course of 206° true, with a speed of 18 knots. At this time you observe Cape Charles Lighted Bell Buoy "14" bearing 222°T and Hog Island Lighted Bell Buoy "12" bearing 015°T. What were the set and drift experienced since 0725?Not learned 6. From your 0741 position, you wish to change course in order to pass 2.2 miles easterly of Cape Charles Lighted Bell Buoy "14". Your engine speed is now 14.0 knots. You estimate the current to be 240°T at 1.8 knots. What is the true course to steer to make good the desired course?Not learned 7. At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220°T at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots?Not learned 8. At 0841 Chesapeake Light bears 164°T, Cape Charles Light bears 312°T, and Cape Henry Light bears 247°T. What was your course made good since 0811?Not learned 9. From your 0841 position, you are steering a course of 241°T to the northeasterly inbound channel entrance, your speed is now 15 knots. What is your ETA abeam of buoy "NCA" (LL#375)?Not learned 10. As you pass through the Chesapeake Bay Bridge and Tunnel, you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316° pgc and 329°psc. What is the deviation on that heading?Not learned 11. The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?Not learned 12. The following questions are to be answered using chart 12221 TR, Chesapeake Bay Entrance, and supporting publications. Your vessel is enroute from New York, NY, to Baltimore, MD. Your vessel's draft is 29 feet, and your height of eye is 54 feet. Your present course is 206°T and your speed is 18 knots. Use 10°W variation where required. At 0705 your position is Latitude 37°20.8' N Longitude 75°29.9' W. If a northwesterly breeze is causing 3 degrees leeway what is the true course to steer in order to pass Hog Island Lighted Bell Buoy "12" at a distance abeam of two miles?Not learned 13. At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206°T and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?Not learned 14. (5.8.2.2B1-3) At about what time will you see Chesapeake Light if visibility is exceptionally clear?Not learned 15. At 0741 you are still steering a course of 206° true, with a speed of 18 knots. At this time you observe Cape Charles Lighted Bell Buoy "14" bearing 222°T and Hog Island Lighted Bell Buoy "12" bearing 015°T. What were the set and drift experienced since 0725?Not learned 16. From your 0741 position, you wish to change course in order to pass 2.2 miles easterly of Cape Charles Lighted Bell Buoy "14". Your engine speed is now 14.0 knots. You estimate the current to be 240°T at 1.8 knots. What is the true course to steer to make good the desired course?Not learned 17. At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220°T at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots?Not learned 18. At 0841 Chesapeake Light bears 164°T, Cape Charles Light bears 312°T, and Cape Henry Light bears 247°T. What was your course made good since 0811?Not learned 19. From your 0841 position, you are steering a course of 241°T to the northeasterly inbound channel entrance, your speed is now 15 knots. What is your ETA abeam of buoy "NCA" (LL#375)?Not learned 20. As you pass through the Chesapeake Bay Bridge and Tunnel, you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316° pgc and 329°psc. What is the deviation on that heading?Not learned 21. The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?Not learned 22. The following questions are to be answered using chart 12221 TR, Chesapeake Bay Entrance, and supporting publications. Your vessel is enroute from New York, NY, to Baltimore, MD. Your vessel's draft is 29 feet, and your height of eye is 54 feet. Your present course is 206°T and your speed is 18 knots. Use 10°W variation where required. At 0705 your position is Latitude 37°20.8' N Longitude 75°29.9' W. If a northwesterly breeze is causing 3 degrees leeway what is the true course to steer in order to pass Hog Island Lighted Bell Buoy "12" at a distance abeam of two miles?Not learned 23. At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206°T and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?Not learned 24. (5.8.2.2B1-3) At about what time will you see Chesapeake Light if visibility is exceptionally clear?Not learned 25. At 0741 you are still steering a course of 206° true, with a speed of 18 knots. At this time you observe Cape Charles Lighted Bell Buoy "14" bearing 222°T and Hog Island Lighted Bell Buoy "12" bearing 015°T. What were the set and drift experienced since 0725?Not learned 26. From your 0741 position, you wish to change course in order to pass 2.2 miles easterly of Cape Charles Lighted Bell Buoy "14". Your engine speed is now 14.0 knots. You estimate the current to be 240°T at 1.8 knots. What is the true course to steer to make good the desired course?Not learned 27. At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220°T at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots?Not learned 28. At 0841 Chesapeake Light bears 164°T, Cape Charles Light bears 312°T, and Cape Henry Light bears 247°T. What was your course made good since 0811?Not learned 29. From your 0841 position, you are steering a course of 241°T to the northeasterly inbound channel entrance, your speed is now 15 knots. What is your ETA abeam of buoy "NCA" (LL#375)?Not learned 30. As you pass through the Chesapeake Bay Bridge and Tunnel, you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316° pgc and 329°psc. What is the deviation on that heading?Not learned 31. The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?Not learned 32. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. You are turning for 12.7 knots. Your vessel's deep draft is 16 feet. Gyro error is 2°W. Use 14°W for variation where required. DEVIATION TABLE Magnetic Heading Deviation 045° 3.0°E 060° 3.0°E 075° 1.5°E 090° 0.5°W At 2127 you take the following round of bearings: Old Field Point Light 224.0°pgc Middle Ground Light 320.5°pgc Stratford Point Light 348.0°pgc Based on the above fix, which statement is TRUE?Not learned 33. At 2127 you are on course 076°T. What is your ETA at a position where Twenty Eight Foot Shoal Lighted Bell Buoy "TE" is abeam to port?Not learned 34. At 2200 Middle Ground Light is bearing 270°T at 9 nm. Which statement is TRUE?Not learned 35. You alter course to make good 076°T from your 2200 fix, and estimate you will make 13.6 knots over the ground. If the visibility is 5.5 miles, what is the earliest time you will sight Falkner Island Light? (nominal range 13 miles)Not learned 36. At 2214 you receive a "Securite" call requesting you to remain at least 2 miles away from underwater work taking place at LAT 41°07.8'N, LONG 72°34.6'W. If you change course at 2220 and allow 3° leeway for southerly winds which course will you steer per gyrocompass to comply with this request? No allowance made for current.Not learned 37. At 2236 Falkner Island Light bears 024°T at a range of 8.6 nm. What was the speed made good along the track line since your 2200 fix?Not learned 38. At 2310 your position is LAT 41°05.5'N, LONG 72°33.7'W and you change course to make good 068°T. A radar speed check using Twenty Eight Foot Shoal Buoy indicates your speed over the ground is 13.6 knots. At 2325 Horton Point Light bears 129°T. At 2341 the same light bears 194°T. What is the position of your 2341 running fix?Not learned 39. At 2342 the gyro alarm sounds and you commence steering by standard magnetic compass. If you allow 3° leeway for southerly winds and do not correct for any existing current, what is the course to steer by standard magnetic compass to make good 068°T?Not learned 40. At 2350 the gyro is restored to service. At 0016 the visibility improves. At 0028 you sight Bartlett Reef Light in line with New London Harbor Light bearing 039°pgc. What is the gyro error?Not learned 41. The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 29 feet (8.8 meters). Your height of eye is 52 feet (15.8 meters) and visibility is 6.0 miles. At which approximate range will you first sight the light?Not learned 42. The following questions should be answered using Chart 12354TR, Long Island Sound - Eastern Part, and the supporting publications. You are on a coastwise voyage from Bridgeport, Conn., to Boston, Mass. You intend to divert to a position off New Haven, Conn., to evacuate an injured crew member. Your height of eye is 53 feet and your vessel's deep draft is 34 feet. Gyro error is 2°W. Use 14°W variation where required. At 0820 Old Field Point Light bears 206° per gyrocompass, and Stratford Shoals Middle Ground Light bears 322° per gyrocompass. The radar range to Middle Ground Light is 1.5 miles. What is your 0820 position?Not learned 43. From your 0820 position you change course to your rendezvous position, one mile due south of buoy "NH", speed 14.5 knots. You estimate the current to be 260°T at 0.5 knot. The wind is northwesterly at 20 knots and you estimate 2° leeway. What is your course per gyrocompass (pgc) to the rendezvous position, if you correct your heading for current and leeway?Not learned 44. At 0847 you take a round of bearings as follows: Middle Ground Shoal Light 237°pgc Stratford Point Light 289°pgc New Haven Light 019°pgc What were the set and drift since your 0820 position?Not learned 45. From your 0847 fix, you change course to arrive at the rendezvous position and, correcting for current, you estimate your speed over the ground at 15 knots. What is your ETA at the rendezvous?Not learned 46. At 1022 when you complete the evacuation, you get underway on course 098°T and order turns for 14.5 knots. You take the following round of bearings at that time: Stratford Point Light 260° per gyrocompass New Haven Light 326° per gyrocompass SW Ledge Light 358°Not learned 47. As you cross the New Haven Outer Channel range, you observe the range in line bearing 335.5° per gyrocompass. The helmsman reports that he was heading 100° per gyrocompass, and that the standard magnetic compass read 109° at the time of the observation. What are the gyro error and deviation of the standard magnetic compass on this heading?Not learned 48. At 1038 Branford Reef Light bears 019°pgc, Falkner Island Light bears 075°pgc, and the radar range to Branford Reef Light is 3.0 miles. Which statement is TRUE of your 1038 position?Not learned 49. Which of the following describes the north shore of Long Island, from Horton Point to Orient Point?Not learned 50. The visibility is excellent. When Race Rock Light Tower breaks the horizon, how far will you be from the Tower?Not learned 51. The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?Not learned 52. The following questions are to be answered using Chart 13205 TR, Block Island Sound, and supporting publications. There are fog patches. You are turning for 12.1 knots. Your draft is 22 feet. The gyro error is 3°W. DEVIATION TABLE Magnetic Heading Deviation 180° 2.5°E 195° 2.0°E 210° 1.0°E 225° 0.5°W At 2009 you are leaving New London Harbor with buoy "2" close abeam to port, Bartlett Reef Light is at a range of 2.9 nm. What is the true course to the Race that will leave Race Rock Light 0.8 mile abeam to port?Not learned 53. At 2016 you sight N. Dumpling Light in line with Latimer Reef Light (Fl 6 sec, 55 ft) bearing 079°pgc. At the time of the bearing the helmsman reported he was steering 164° pgc and 172° per standard magnetic compass. What is the deviation for that heading?Not learned 54. At which point in the voyage is your vessel bound by the International Rules of the Roads (COLREGS)?Not learned 55. You will pass through the Race at approximately the time of maximum ebb current. As you APPROACH the Race from New London, how will your vessel be set?Not learned 56. At 2030 you take the following radar ranges: Race Rock Light 2.1 miles Latimer Reef Light 6.4 miles If you estimate an average current of 080°T at 1.5 knots, which course will you steer per gyrocompass to leave Endeavor Shoals Gong Buoy bearing 270°T at 1.5 miles?Not learned 57. The light on Block Island Sound South Entrance Obstruction Buoy "BIS" is reported extinguished. Which of the following will serve as a positive warning that you are being set onto the obstruction?Not learned 58. At 2103 you take the following set of bearings: Watch Hill Point Light bears 005° true Montauk Point Light bears 170° true Determine your 2103 fix.Not learned 59. You round Montauk Point and steer to make good 206°T. Speed is increased to 13.0 knots. The current, if any, is unknown. The visibility has improved and is estimated to be 5 miles. At 2144 Montauk Point Light bears 273°T. At 2202 the same light bears 320°T. Which statement concerning your 2202 running fix is TRUE?Not learned 60. At 2229 the gyro fails. What is the course to steer per standard magnetic compass to make good 206°T, if you allow 3° leeway for southeasterly winds?Not learned 61. The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?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