Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Navigation Problems (Set 57)
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Question 1 of 28
At 1610 ZT on 14 August, in DR position LAT 33° 24.6'S, LONG 028°15.4'W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 111.0° psc. The variation is 2°E. What is the deviation?
Browse Questions in Set 57
28 MCQs #1 At 1610 ZT on 14 August, in DR position LAT 33° 24.6'S, LONG 028°15.4'W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 111.0° psc. The variation is 2°E. What is the deviation? #2 At 1318 ZT on 10 September, in DR position LAT 24° 05.8'N, LONG 058° 08.3'E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 254° psc. Variation is 2°W. What is the deviation? #3 At 1620 ZT on 10 September, in DR position LAT 34° 03.8'N, LONG 050° 28.4'W, you observe an amplitude of the Moon. The Moon's upper limb is observed on the visible horizon and bears 110.2° psc. The variation is 2°E. What is the deviation? #4 At 1435 ZT on 27 April, in DR position LAT 51° 56.8'N, LONG 150° 37.7'E, the Moon's upper limb is observed on the visible horizon, bearing 242.2° psc. Variation is 2°W. What is the deviation? #5 At 2231 ZT on 14 July you are in DR position LAT 34°06'S, LONG 149°47'W, when you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 257.1°psc. The variation is 15°E. What is the deviation? #6 At 2234 ZT on 14 July you are in DR position LAT 34°03'N, LONG 150°16'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1°pgc. The variation is 14°E. What is the gyro error? #7 At 2043 ZT on 13 October you are in DR position LAT 43°57.3'S, LONG 147°16.0'E, when you observe an amplitude of Venus. The planet is about one Sun's diameter above the horizon and bears 236.2°pgc. The variation is 15°E. What is the gyro error? #8 At 2048 ZT on 13 October you are in DR position LAT 44°02.8'S, LONG 146°58.3'E, when you observe an amplitude of Venus. The planet is about one Sun's diameter above the visible horizon and bears 222.2°psc. The variation is 15°E. What is the deviation? #9 On 15 October your 0325 zone time DR position is LAT 26°51.0'N, LONG 138°17.0'W. At that time, you observe Canopus bearing 167°pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2°E. What is the gyro error? #10 On 5 June your 0420 zone time DR position is LAT 26°47.0'N, LONG 133°19.5'W. At that time, you observe Vega bearing 298.1°psc. The chronometer reads 01h 21m 17s, and the chronometer error is 02m 25s fast. The variation is 3.5°E. What is the deviation of the standard compass? #11 On 28 July your 1937 zone time DR position is LAT 26°13.0'N, LONG 78°27.0'E. At that time, you observe Deneb bearing 048.7°pgc. The chronometer reads 02h 37m 42s, and the chronometer error is 00m 15s fast. The variation is 4°W. What is the gyro error? #12 On 22 April your 0344 zone time DR position is LAT 21°16.0'N, LONG 107°32.0'W. At that time, you observe Spica bearing 236°psc. The chronometer reads 10h 45m 16s, and the chronometer error is 00m 25s fast. The variation is 7.5°E. What is the deviation of the standard compass? #13 Two beacons form a range in the direction of 221.5°T. The range is seen in line from your vessel bearing 223° per gyrocompass. The variation in the area is 4°E. What is the error of your gyrocompass? #14 At 0915 ZT on 26 July you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated ZT of arrival at Seattle? #15 A vessel at LAT 20°00'N, LONG 107°30'W is to proceed to LAT 24°40'N, LONG 112°30'W. What is the course and distance by mid-latitude sailing? #16 Your vessel is on a course of 129°T at 13 knots. At 1937 a light bears 151.5°T. At 2003 the light bears 174°T. At what time and distance off will your vessel be when abeam of this light? #17 Your vessel is on a course of 221°T at 15 knots. At 0319 a light bears 198.5°T, and at 0353 the light bears 176°T. At what time and distance off will your vessel be when abeam of the light? #18 Your vessel is on a course of 307°T at 20 knots. At 0914 a light bears 284.5°T, and at 0937 the light bears 262°T. At what time and distance off will your vessel be when abeam of the light? #19 Your vessel is on a course of 082°T at 19 knots. At 0255 a light bears 059.5°T, and at 0312 the light bears 037°T. At what time and distance off will your vessel be when abeam of the light? #20 Your vessel is on a course of 343°T at 14 knots. At 2156 a light bears 320.5°T, and at 2217 the light bears 298°T. At what time and distance off will your vessel be when abeam of the light? #21 Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and distance off will your vessel be when abeam of the light? #22 Your vessel is on a course of 034°T at 17 knots. At 0551 a light bears 056.5°T, and at 0623 the light bears 079°T. At what time and distance off will your vessel be when abeam of the light? #23 Your vessel is on a course of 107°T at 16 knots. At 0403 a light bears 129.5°T, and at 0426 the light bears 152°T. At what time and distance off will your vessel be when abeam of the light? #24 You are steering a course of 316°T, and a light bears 34° on the port bow at 2053. At 2126 the same light bears 68° on the port bow, and you have run 5 miles since the first bearing. What is the ETA when the lighthouse is abeam? #25 You are at anchor in the anchorage at the entrance to Delaware Bay. You weigh anchor at 1445 DST (ZD +4) on 24 July 1983 and proceed northbound enroute to Philadelphia at a speed of 10 knots. Which of the following should you expect to experience? #26 Your vessel is at the approaches to Savannah, GA, with the wind coming out of the west. What will be the approximate direction of the wind-driven current? #27 If the height of the tide at low water is 0.0 feet, the range is 9.0 feet, and the duration is 06h 00m. What is the height of the tide 02h 12m before high water? #28 What is the mean tide level at Peaks Island, ME?
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