Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Navigation Problems (Set 49)
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Question 1 of 30
On 17 June your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?
Browse Questions in Set 49
30 MCQs #1 On 17 June your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass? #2 On 17 April your 1610 ZT DR position is LAT 22°07.0'N, LONG 158°16.0'W. At that time, you observe the Sun bearing 271°psc. The chronometer reads 03h 08m 52s, and the chronometer error is 01m 16s slow. The variation is 4°E. What is the deviation of the standard magnetic compass? #3 A vessel steams 640 miles on course 047°T from LAT 34°45'N, LONG 140°00'E. What are the latitude and longitude of the point of arrival by mid-latitude sailing? #4 You are planning a voyage by great circle from the mouth of the Delaware River (LAT 38°40'N, LONG 75°00'W) to Lisbon, Portugal. Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274.) #5 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. #6 On 11 January your 0450 ZT position is LAT 38°42'N, LONG 14°16'W. You observe Polaris bearing 358.5°pgc. At the time of the observation the helmsman noted that he was heading 160°pgc and 173°psc. The variation is 9°W. What is the deviation for that heading? #7 On 5 February your 2320 ZT position is LAT 52°28'N, LONG 23°48'W. You observe Polaris bearing 000.2°pgc. At the time of the observation the helmsman noted that he was heading 224°pgc and 244°psc. The variation is 20°W. What is the deviation for that heading? #8 Determine the distance from LAT 59°12'N, LONG 14°00'W to LAT 59°12'N, LONG 03°20'W, by parallel sailing. #9 You are on course 251°pgc and 241° per magnetic compass, when you observe a range in line bearing 192°pgc. The chart indicates that the range is in line on a bearing of 194°T. The variation is 16°E. What is the deviation of the magnetic compass? #10 Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 014°T, and the variation is 11°E. If the heading of your vessel at the time of the sighting is 009° per standard magnetic compass, what is the correct deviation? #11 On 3 October your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronometer time of the observation is 08h 32m 04s, and the chronometer is 0m 27s slow. The variation is 5.5°W. What is the gyro error? #12 On 11 July your 0240 ZT position is LAT 14°52'N, LONG 34°23'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 279°pgc and 299°psc. The variation is 19°W. What is the deviation for that heading? #13 On 5 August your 0310 ZT position is LAT 09°02'N, LONG 21°08'W. You observe Polaris bearing 002°pgc. At the time of the observation the helmsman noted that he was heading 316°pgc and 329°psc. The variation is 15°W. What is the deviation for that heading? #14 Your vessel is proceeding down a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 229°T, and variation is 6°W. If the heading of your vessel at the time of the sighting is 232° per standard magnetic compass, what is the deviation? #15 You are planning a voyage by great circle from LAT 38°00'N, LONG 73°00'W to LAT 49°00'N, LONG 06°00'W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274) #16 Your voyage commences off Cape May, NJ, at LAT 38°40'N, LONG 74°00'W, for LAT 44°00'N, LONG 10°00'W. Sea ice is north of 45°N and west of 45°W. Extensive naval exercises will be conducted within a 150-mile radius of LAT 50°00'N, LONG 35°00'W. Which statement about a direct great circle route is TRUE? (Use gnomonic tracking chart WOXZC 5274.) #17 On 9 September your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading? #18 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a true heading of 236°. HEADING PSC-PGC 030.5°-024° 061.5°-054° 092.0°-084° 122.5°-114° 152.0°-144° 181.0°-174° 210.0°-204° 239.5°-234° 269.0°-264° 298.0°-294° 327.5°-324° 358.5°-354° #19 On 19 November your 0146 ZT position is LAT 33°48'N, LONG 25°22'E. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 224°pgc and 222.5°psc. The variation is 2°E. What is the deviation for that heading? #20 The great circle distance from LAT 08°50.0'N, LONG 80°21.0'W to LAT 12°36.0'N, LONG 128°16.0'E is 8664 miles, and the initial course is 306.6°T. Determine the latitude of the vertex. #21 Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 196°T, and the variation is 7°E. If the heading of your vessel at the time of the sighting is 192° per standard magnetic compass, what is the deviation? #22 At 2326 ZT on 22 June, your vessel's position is LAT 28°30'N, LONG 150°04'W. An azimuth of the planet Jupiter is observed, and the standard compass bearing is 250.4°. The chronometer reads 09h 24m 36s and is 01m 12s slow. The variation of this area is 13.5°E. What is the deviation of the standard compass? #23 On 11 December your 1816 ZT DR position is LAT 26°30.0'N, LONG 140°35.0'E. At that time, you observe Venus bearing 230°pgc. The chronometer reads 09h 14m 52s and the chronometer error is 01m 02s slow. The variation is 3.5°E. What is the gyro error? #24 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 039°. HEADING PSC-PGC 030.5°-024° 061.5°-054° 092.0°-084° 122.5°-114° 152.0°-144° 181.0°-174° 210.0°-204° 239.5°-234° 269.0°-264° 298.0°-294° 327.5°-324° 358.5°-354° #25 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 057°. HEADING PSC-PGC 030.5°-020° 061.5°-050° 092.0°-080° 122.5°-110° 152.0°-140° 181.0°-170° 210.0°-200° 239.5°-230° 269.0°-260° 298.0°-290° 327.5°-320° 358.5°-350° #26 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 143°. HEADING PSC-PGC 030.5°-020° 061.5°-050° 092.0°-080° 122.5°-110° 152.0°-140° 181.0°-170° 210.0°-200° 239.5°-230° 269.0°-260° 298.0°-290° 327.5°-320° 358.5°-350° #27 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 104°. HEADING PSC-PGC 030.5°-020° 061.5°-050° 092.0°-080° 122.5°-110° 152.0°-140° 181.0°-170° 210.0°-200° 239.5°-230° 269.0°-260° 298.0°-290° 327.5°-320° 358.5°-350° #28 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 234°. HEADING PSC-PGC 030.5°-020° 061.5°-050° 092.0°-080° 122.5°-110° 152.0°-140° 181.0°-170° 210.0°-200° 239.5°-230° 269.0°-260° 298.0°-290° 327.5°-320° 358.5°-350° #29 You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 210°. HEADING PSC-PGC 030.5°-024° 061.5°-054° 092.0°-084° 122.5°-114° 152.0°-144° 181.0°-174° 210.0°-204° 239.5°-234° 269.0°-264° 298.0°-294° 327.5°-324° 358.5°-354° #30 Which statement about a great circle track between Cape Flattery (LAT 48°30'N, LONG 125°00'W) and Guam (LAT 14°00'N, LONG 145°00'E) is TRUE? (Use gnomonic tracking chart WOXZC 5270)
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