USCG Navigation Problems: Master's License

This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.

95: You complete changing out your tow and get underway enroute Memphis, Tennessee to deliver 2 tank barges. What is the distance you must travel from Cairo Point Light to the Lion Oil Refining Co. Docks in Memphis?
342: If the visibility is 11 miles, what is the earliest time you can expect to see New Haven Light?
391: A vessel at LAT 40°42.0'N, LONG 74°01.0'W, heads for a destination at LAT 14°41.0'N, LONG 17°26.0'W. Determine the true course and distance by Mercator sailing.
397: Your vessel departs LAT 32°45'N, LONG 79°50'W, and is bound for LAT 34°21'S, LONG 18°29'E. Determine the distance by Mercator sailing. 

    N a. 5,021 miles
    Y b. 6,884 miles
    N c. 6,954 miles
    N d. 7,002 miles
417: A vessel at LAT 21°32'N, LONG 160°30'W, heads for a destination at LAT 30°00'N, LONG 150°00'E. Determine the true course and distance by Mercator sailing. 

    N a. 273°T, 2645 miles
    N b. 273°T, 2692 miles
    Y c. 281°T, 2733 miles
    N d. 284°T, 2762 miles
560: Which loran line can you follow to remain clear of all danger until south of New London? 

    Y a. 9960-Y-43960
    N b. 9960-X-26450
    N c. 9960-W-14900
    N d. 9960-W-15000
569: At 0823, Old Point Comfort Light bears 000°T at 0.6 mile. What is your 0823 position? 

    N a. LAT 36°59.8'N, LONG 76°18.0'W
    Y b. LAT 36°59.5'N, LONG 76°18.4'W
    N c. LAT 36°59.0'N, LONG 76°19.6'W
    N d. LAT 36°55.5'N, LONG 76°18.6'W
595: You are passing the Bayou Sara Gage which reads 3.9 feet. The low water reference plane (LWRP) at Bayou Sara is 5.25 feet. Which of the following statements is TRUE? 

    N a. The river level is above the Low Water Reference Plane.
    N b. Red Store Landing Revetment is ahead on your starboard side
    N c. This gage reading is at a lower elevation than the same reading on the Gage at Head of Passes.
    Y d. None of the above.
606: At 0915 zone time, on 11 May , 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 19.5 knots. The distance is 4,276 miles. What is your estimated zone time of arrival at Seattle? 

    Y a. 1932, 19 May
    N b. 0332, 20 May
    N c. 1032, 20 May
    N d. 1232, 20 May
615: Your vessel departs Yokohama from position LAT 35°27.0'N, LONG 139°39.0'E (ZD -9), at 1330 ZT, on 23 July, bound for Seattle at position LAT 47°36.0'N, LONG 122°22.0'W (ZD +8). The distance by great circle is 4,245 miles, and you estimate that you will average 13.6 knots. What is your estimated ZT of arrival? 

    N a. 0438, 4 August
    Y b. 2038, 4 August
    N c. 0438, 5 August
    N d. 1238, 5 August
638: What is the mile point of the Fulton Gage? 

    Y a. 778 AHP
    N b. 687 AHP
    N c. 632 AHP
    N d. 598 AHP
753: On 10 June , your 2010 zone time DR position is LAT 41°10.0'N, LONG 61°15.0'W. At that time, you observe Polaris with a sextant altitude (hs) of 40°35.8'. The chronometer time of the sight is 00h 08m 18s, and the chronometer error is 01m 54s slow. The index error is 2.0' on the arc, and the height of eye is 40 feet. What is your latitude by Polaris? 

    N a. 41°10.6'N
    Y b. 41°15.0'N
    N c. 41°18.3'N
    N d. 41°21.2'N
1091: On 10 August , your 0430 ZT position is LAT 29°56.7'S, LONG 139°11.0'E. Your course is 321°T, speed 18.2 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0500 running fix. NP-0021

    N a. LAT 29°46.0'S, LONG 138°54.0'E
    Y b. LAT 29°49.2'S, LONG 138°57.0'E
    N c. LAT 29°56.0'S, LONG 139°03.8'E
    N d. LAT 30°07.5'S, LONG 138°55.2'E
1094: On 12 Oct. , your vessel is on course 081°T, speed 20 knots. Your 1800 zone time DR position is LAT 26°11.0'S, LONG 77°18.0'E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1835 running fix. NP-0024

    N a. LAT 26°05.5'S, LONG 77°14.5'E
    N b. LAT 26°07.5'S, LONG 77°34.0'E
    N c. LAT 26°09.0'S, LONG 77°27.5'E
    Y d. LAT 26°12.0'S, LONG 77°31.0'E
1124: The Vicksburg Gage reads 31.9 feet. The high point on your towboat is 43 feet above the water. What is the vertical clearance as you pass under the Vicksburg Highway 80 Bridge? 

    N a. 36.2 feet
    Y b. 41.4 feet
    N c. 58.0 feet
    N d. 84.3 feet
1460: On 27 June , your 1905 ZT DR position is LAT 24°35.0'N, LONG 50°15.0'W. At that time, you observe Saturn bearing 211°pgc. The chronometer reads 10h 04m 26s and the chronometer error is 01m 20s slow. The variation is 4.5°E. What is the gyro error? 

    Y a. 1.1°W
    N b. 3.4°E
    N c. 3.4°W
    N d. 5.6°W
1483: On 31 May , your vessel's 1420 zone time DR position is LAT 29°06'N, LONG 120°06'W, when an azimuth of the Sun is observed. The bearing of the Sun per standard magnetic compass was 255.3°. The chronometer time of the observation is 10h 17m 24s. The chronometer error is 02m 32s slow. The variation for this area is 12.9°E. What is the deviation of the standard magnetic compass? 

    Y a. 2.5°W
    N b. 2.9°W
    N c. 2.9°E
    N d. 3.2°E
1659: On 15 July , in DR position LAT 22°19.0'N, LONG 154°37.0'W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 298°psc. The chronometer reads 04h 45m 19s and is 01m 56s slow.
Variation in the area is 7.5°W. What is the deviation of the standard magnetic compass? 

    N a. 2.7°W
    Y b. 3.0°E
    N c. 3.6°W
    N d. 3.9°E
1707: You are passing the Memphis Gage at 0405, 18 March. If you are turning for 8 mph and estimate the current at 2.3 mph,
what is your ETA at Cairo Point, IL (mile 954.5 AHP)? 

    N a. 0447, 19 Mar
    N b. 1052, 19 Mar
    N c. 1518, 19 Mar
    Y d. 1839, 19 Mar
1757: What town is located at mile 395 AHP? 

    Y a. St. Joseph
    N b. Belmont
    N c. St. James
    N d. Rodney
1758: As you approach mile 425 AHP, you see a brown shaded area along the left descending bank. This represents __________. 

    N a. weirs
    Y b. a revetment
    N c. dikes
    N d. a fleeting area
1777: At 2232 ZT, on 14 July , in DR position LAT 33°52'S, LONG 150°03'W you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 268.5°pgc. The variation is 15°E. What is the gyro error? 

    Y a. 1.0°E
    N b. 0.5°E
    N c. 0.0°
    N d. 0.5°W
1955: At 1814, on 11 September, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day? 

    Y a. 8.7 mph
    N b. 7.7 mph
    N c. 6.3 mph
    N d. 5.6 mph
2120: At 1502 ZT, on 4 August , in DR position LAT 11° 21.6' S, LONG 088° 14.3' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 289° psc. The variation is 15° W. What is the deviation? 

    N a. 1.1°E
    Y b. 1.1°W
    N c. 1.9°E
    N d. 1.9°W
2174: On 18 October , at 0518 ZT, morning stars were observed and the vessel's position was determined to be LAT 25°31.0'N, LONG 146°29.2'E. Your vessel is steaming at 19.0 knots on a course of 308°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 11h 17m 11s, and the sextant altitude (hs) is 34°51.4'. The index error is 2.0' off the arc, and the chronometer error is 01m 57s fast. Your height of eye on the bridge is 54.0 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    N a. 120.6°T
    N b. 121.9°T
    Y c. 125.5°T
    N d. 127.3°T
2333: You observe the lower limb of the Sun at a sextant altitude (hs) of 37°47.2' on 11 October . The index error is 3.0' off the arc. The height of eye is 63 feet (19.2 meters). What is the observed altitude (Ho)? 

    N a. 37°25.2'
    N b. 37°42.5'
    N c. 37°51.5'
    Y d. 37°57.5'
2335: You are underway and intend to make good a course of 088°T. You experience a current with a set and drift of 300°T at 2.4 knots, and a southerly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 16 knots. What will be your speed made good over your intended course of 088°T? 

    N a. 13.4 knots
    Y b. 13.9 knots
    N c. 14.4 knots
    N d. 14.9 knots
2786: At 1030, 13 January, you are passing Columbus Point Lt. (mile 936.1 AHP). What has been your average speed since leaving St. Louis (mile 181 UMR) on the 12th of January at 1400 hours? 

    N a. 10.4 mph
    Y b. 9.7 mph
    N c. 9.4 mph
    N d. 9.1 mph
2882: Your vessel is steering 096°T at 17 knots. At 1847 a light bears 057°T, and at 1916 the same light bears 033°T. What will be your distance off abeam? 

    N a. 9.9 miles
    N b. 10.7 miles
    Y c. 11.4 miles
    N d. 11.9 miles
2908: Your vessel is on a course of 223°T at 17 knots. At 1323 a lighthouse bears 318° relative. At 1341 the same lighthouse bears 287° relative. What is your distance off the lighthouse at 1341? 

    N a. 4.3 miles
    N b. 5.1 miles
    Y c. 6.6 miles
    N d. 7.8 miles
3253: You have steamed 925 miles at 13.5 knots, and consumed 181 tons of fuel. If you have 259 tons of usable fuel remaining, how far can you steam at 16 knots? 

    N a. 795 miles
    Y b. 942 miles
    N c. 1117 miles
    N d. 1409 miles
3470: You are underway on course 000°Tat 9.5 knots. The current is 082°T at 1.1 knots. What is the speed being made good? 

    N a. 9.2 knots
    N b. 9.5 knots
    Y c. 9.8 knots
    N d. 10.1 knots
3630: You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good? 

    N a. 183°psc
    Y b. 189°psc
    N c. 210°psc
    N d. 223°psc
3649: The true course between two points is 078°. Your gyrocompass has an error of 2°E. You make an allowance of 3° leeway for a north wind. What gyro course should be steered to make the true course good? 

    Y a. 073°pgc
    N b. 075°pgc
    N c. 077°pgc
    N d. 079°pgc
10100: Your GPS position is LAT 36°59.0'N, LONG 75°48.6'W. What is the course per standard magnetic compass to a position one mile south of Cape Charles Buoy "14" (which is positioned at LAT 37°07.4'N, LONG 75°41.0'W)? 

    Y a. 045°psc
    N b. 049°psc
    N c. 053°psc
    N d. 057°psc
10606: At 0915 your GPS position is LAT 41°04.9'N, LONG 72°42.1'W. You are on course 085° per standard magnetic compass at a speed of 6 knots. At 1030 your GPS position is 0.5 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift? 

    N a. 042°T at 2.4 knots
    Y b. 045°T at 1.9 knots
    N c. 221°T at 2.0 knots
    N d. 225°T at 2.3 knots
10903: What is the distance from Norfolk to Philadelphia for a deep draft vessel via the Chesapeake Bay and C and D Canal ? 

    N a. 209 miles
    Y b. 245 miles
    N c. 286 miles
    N d. 302 miles
11509: At 1014 you depart the entrance to Lake Montauk with light "1" close aboard. Your course is 066° per standard magnetic compass, and the speed is 8.6 knots. At 1232 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the course made good? 

    N a. 036°T
    Y b. 040°T
    N c. 044°T
    N d. 047°T
11805: What is the true course to steer between Stratford Shoal (Middle Ground Light) and New Haven Light, if the set and drift of the current are 048°T at 2 knots, and a southeasterly wind will cause 2° of leeway? Your engines are making turns for 10 knots. 

    N a. 032°T
    Y b. 037°T
    N c. 039°T
    N d. 041°T
15419: The mean high water level at Old Point Comfort is __________. 

    Y a. 2.6 feet (0.8 meters)
    N b. 1.2 feet (0.4 meters)
    N c. 0.0 feet
    N d. -3.5 feet (-1.1 meters)
15445: 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? 

    N a. 337.5°, 359.5°, 028.0°
    N b. 337.5°, 357.5°, 026.0°
    N c. 324.0°, 352.5°, 009.5°
    Y d. 340.0°, 000.5°, 025.0°
15458: You are delayed in sailing due to engineering problems. You get underway at 0630. A Coast Guard radio broadcast advises that an aircraft carrier will transit the Elizabeth River enroute Norfolk Naval Shipyard and a safety zone is in effect. Further information on how far you must remain from the carrier found is in __________. 

    N a. PUB 117
    N b. Light List
    Y c. Coast Pilot
    N d. Chart Number 1
15511: From your 1830 fix, you come left to a course of 290°T.
Which of the following statements concerning Watch Hill Light is FALSE? 

    N a. The nominal range of its white light is 15 miles.
    N b. It displays both red and white lights.
    N c. Its horn blasts every 30 seconds in fog.
    Y d. Its geographic range is 18.5 miles at a 35 foot (10.7 meter) height of eye.
15544: 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? 

    N a. LAT 41°07.9'N, LONG 72°25.9'W
    N b. LAT 41°08.3'N, LONG 72°25.8'W
    Y c. LAT 41°08.5'N, LONG 72°25.6'W
    N d. LAT 41°08.8'N, LONG 72°25.2'W
15627: What is the vertical clearance of the Natchez Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.1 ft)? 

    N a. 102.2 ft
    N b. 108.3 ft
    Y c. 119.4 ft
    N d. 125.6 ft
15857: You are southeast of Saybrook Breakwater Light passing a horizontally-banded buoy. This buoy marks __________. 

    N a. a sunken wreck
    N b. a tide rips area
    N c. the junction with the Connecticut River
    Y d. shoal water
15938: At 1910 you obtain the following bearings:

Bartlett Reef Light 268°T
Race Rock Light 147°T
Little Gull Island Light 198°T

Which of the following is your position at 1910? 

    N a. LAT 41°17.4'N, LONG 72°05.6'W
    N b. LAT 41°17.0'N, LONG 72°07.1'W
    Y c. LAT 41°16.6'N, LONG 72°04.6'W
    N d. LAT 41°16.2'N, LONG 72°06.4'W
15961: At 1810, a red buoy bears 010° relative. This buoy marks __________. 

    N a. the side of York Spit Channel
    N b. the visibility limit of the red sector of Cape Henry Light
    N c. a submerged obstruction in York Spit Channel
    Y d. the York River Entrance Channel
16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T? 

    N a. 0601
    Y b. 0609
    N c. 0620
    N d. 0624
16046: The visibility is excellent. When Race Rock Light Tower breaks the horizon, how far will you be from the Tower? 

    N a. 8.5 miles
    N b. 9.6 miles
    N c. 14.0 miles
    Y d. 17.9 miles
16264: Which statement about your 0400 position is true? 

    N a. You are governed by the Inland Rules of the Road.
    N b. Anchoring, trawling and fishing are prohibited.
    N c. The ocean floor is composed of shingle.
    Y d. You are within the Territorial Sea and the contiguous zone.
16517: 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? 

    N a. 079°pgc
    N b. 076°pgc
    N c. 074°pgc
    Y d. 071°pgc
16620: 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? 

    N a. The true heading at the observation was 090°.
    Y b. The deviation is 1.5°E by observation.
    N c. The magnetic compass error is 9.5°W.
    N d. The gyro error is 2°E.
16713: At 0600 you take the following bearings:

Point Judith Light bearing 063°pgc
Block Island North Reef Light bearing 144°pgc

What is your 0600 position? 

    N a. LAT 41°18.1'N, LONG 71°38.3'W
    Y b. LAT 41°18.3'N, LONG 71°38.7'W
    N c. LAT 41°18.4'N, LONG 72°38.1'W
    N d. LAT 41°18.5'N, LONG 71°38.9'W