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.

148: You are turning for 8.2 mph and estimate the current at 1.5 mph. What is you speed over the ground?
214: From your 1930 position, you plot a course to pass 0.5 mile due south of Race Rock Light. If your vessel's speed is 10.0 knots, the current's set and drift are 040°T at 1.8 knots, and a north wind produces a 3° leeway, what true course should you steer to make good your desired course?
216: NOAA VHF-FM weather broadcasts from New London, CT are on __________.
291: What is the height above water of Davis Creek Channel Light "1"? 

    Y a. 15 feet (4.6 meters)
    N b. 17 feet (5.2 meters)
    N c. 19 feet (5.8 meters)
    N d. 24 feet (7.3 meters)
347: If you change course at 0420, what is the course to make good to leave Twenty Eight Foot Shoal Lighted Buoy abeam to port at 1 mile? 

    N a. 086°T
    Y b. 084°T
    N c. 082°T
    N d. 079°T
387: The wind is southerly, and you estimate 3° leeway. Allowing for leeway, what is the course to steer from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"? 

    Y a. 087°pgc
    N b. 085°pgc
    N c. 081°pgc
    N d. 079°pgc
399: A vessel at LAT 11°22'S, LONG 009°18'E heads for a destination at LAT 06°52'N, LONG 57°23'W. Determine the true course and distance by Mercator sailing. 

    N a. 296°T, 3,825.3 miles
    N b. 296°T, 4,154.2 miles
    N c. 285°T, 3,825.3 miles
    Y d. 285°T, 4,154.2 miles
450: If you want to put into Point Judith Harbor of Refuge, what chart should you use? 

    Y a. 13219
    N b. 13217
    N c. 13209
    N d. 13205
573: Visibility has decreased to 1 mile in haze. At 0948, you take the following radar ranges. What course should you steer from this fix to the York Spit channel between buoys "19" and "20"?

Thimble Shoal Light - 5.9 miles South end of trestle C of the Chesapeake Bay Bridge and Tunnel - 3.8 miles South end of trestle B of the Chesapeake Bay Bridge and Tunnel - 5.4 miles 

    Y a. 010°pgc
    N b. 008°pgc
    N c. 004°pgc
    N d. 001°pgc
617: Your vessel will sail from a position in LAT 8°51.0'N, LONG 81°31.0'W to a position at LAT 33°51.5'S, LONG 151°13.0'E. The distance by great circle is 7,635 miles, and you estimate an average speed of 15.0 knots. What is your estimated zone time of arrival if you depart at 1510 ZT, on 23 July? 

    Y a. 1110, 14 August
    N b. 0110, 14 August
    N c. 1110, 13 August
    N d. 1510, 13 August
990: On 24 March , your 0800 zone time fix gives you a position of LAT 22°16.0'N, LONG 31°45.0'W. Your vessel is steaming a course of 285°T at a speed of 16.5 knots. An observation of the Sun's upper limb is made at 0938 zone time, and the observed altitude (Ho) is 46°32.2'. The chronometer reads 11h 41m 01s, and the chronometer error is 02m 50s fast. Local apparent noon occurs at 1214 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 68°55.8'. Determine the vessel's 1200 zone time position. 

    N a. LAT 22°35.0'N, LONG 30°29.0'W
    Y b. LAT 22°35.0'N, LONG 32°51.0'W
    N c. LAT 22°36.0'N, LONG 32°10.5'W
    N d. LAT 22°36.0'N, LONG 32°55.2'W
1176: On 24 January , your 0700 zone time DR position is LAT 22°25.0'N, LONG 46°10.0'W. Your vessel is on course 110°T at a speed of 12.0 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1203
    N b. 1208
    Y c. 1212
    N d. 1215
1178: On 27 August , your 0900 zone time DR position is LAT 24°25.0'N, LONG 94°20.0'W. Your vessel is on course 071°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)? 

    Y a. 1214
    N b. 1208
    N c. 1206
    N d. 1158
1191: On 14 October , your 0800 ZT DR position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 knots. What is the ZT of local apparent noon (LAN)? 

    N a. 1142
    N b. 1148
    N c. 1152
    Y d. 1156
1228: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 8.9 ft. If the highest point on your vessel is 54 ft. above the water, what is your vertical clearance? 

    Y a. 63.1 feet
    N b. 65.3 feet
    N c. 67.2 feet
    N d. 122.0 feet
1260: On 16 March , your 0330 ZT DR position is LAT 22°36.0'S, LONG 76°16.0'E. You are on course 098°T at a speed of 16 knots. What will be the ZT of sunrise at your vessel? 

    N a. 0545
    Y b. 0553
    N c. 0600
    N d. 0608
1463: On 26 May , your 0723 zone time DR position is LAT 24°50.0'N, LONG 38°11.0'W. At that time, you observe the Sun bearing 076.5°psc. The chronometer reads 10h 25m 43s, and the chronometer error is 02m 57s fast. The variation is 7°W. What is the deviation of the standard magnetic compass? 

    N a. 3.3°E
    N b. 3.7°W
    N c. 8.3°W
    Y d. 10.7°E
1474: On 14 January , your 0746 zone time DR position is LAT 26°37.0'N, LONG 153°19.0'W. At that time, you observe the Sun bearing 123°psc. The chronometer reads 05h 49m 16s, and the chronometer error is 02m 29s fast. The variation is 3°W. What is the deviation of the standard magnetic compass? 

    Y a. 1.4°W
    N b. 1.6°E
    N c. 3.4°E
    N d. 4.4°W
1664: On 10 February in DR position LAT 25°32.0'N, LONG 135°15.0'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 109°psc. The chronometer reads 09h 43m 25s and is 03m 20s fast. Variation in the area is 4.5°W. What is the deviation of the standard magnetic compass? 

    Y a. 1.6°E
    N b. 2.9°W
    N c. 10.5°E
    N d. 30.5°W
1743: You are in charge of a vessel that damages an aid to navigation established and maintained by the United States.
Which statement is TRUE? 

    N a. You must take the aid in tow and deliver it to the nearest Coast Guard, Marine Safety Office.
    N b. You must report the allision to the nearest Corps.. of Engineers Office.
    Y c. You must report the accident to the nearest Officer in Charge, Marine Inspection.
    N d. You may wait until you reach your destination before reporting the allision to the U.S. Coast Guard.
1864: At 0520 zone time, on 17 March , while taking stars for a morning fix, you observe an unidentified star bearing 050°T, at an observed altitude (Ho) of 45°00.0'. Your DR position at the time of the sight is LAT 27°23.0'N, LONG 39°42.0° W. The chronometer time of the sight is 08h 22m 15s, and the chronometer error is 01m 45s fast. Your vessel is steaming on a course of 300°T at a speed of 18 knots. What star did you observe? 

    N a. Altair
    N b. Alkaid
    N c. Arcturus
    Y d. Deneb
1895: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 195°T at an observed altitude (Ho) of 03°30.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe? 

    Y a. Peacock
    N b. Schedar
    N c. Ankaa
    N d. Alioth
1918: On 14 January , your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 295°T at an observed altitude (Ho) of 13°50.7'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe? 

    N a. Elnath
    N b. Fomalhaut
    N c. Pollux
    Y d. Markab
1959: The charts show two dashed lines crossing the river just south of St. Catherine Bar Light. What does this indicate? 

    N a. Overhead power lines
    N b. Louisiana-Mississippi ferry crossings
    N c. Two railroad trestles
    Y d. Two submerged oil pipelines
1961: The Delta-Friar Point revetment on the LMR extends from mile __________. 

    Y a. 657.3 - 652.2 LDB
    N b. 652.8 - 649.6 RDB
    N c. 648.5 - 645.5 LDB
    N d. 645.6 - 641.4 RDB
2280: You observe the lower limb of the Sun at a sextant altitude (hs) of 28°24.7' on 17 May . The index error is 1.5' off the arc. The height of eye is 86 feet (26 meters). What is the observed altitude (Ho)? 

    N a. 28°29.7'
    N b. 28°30.6'
    Y c. 28°31.5'
    N d. 28°32.9'
2869: Your vessel is on a course of 237°T at 18 knots. At 0404 a light bears 263.5°T, and at 0430 the light bears 282°T. At what time and at what distance off will your vessel be when abeam of the light? 

    N a. 0448, 6.8 miles
    N b. 0452, 7.2 miles
    Y c. 0456, 7.8 miles
    N d. 0500, 8.4 miles
2881: Your vessel is steering 049°T at 15 knots. At 1914 a light bears 078°T, and at 1951 the same light bears 116°T. What will be your distance off abeam? 

    Y a. 6.7 miles
    N b. 7.1 miles
    N c. 7.5 miles
    N d. 8.3 miles
2889: While underway you sight a light 11° on your port bow at a distance of 12 miles. Assuming you make good your course, what will be your distance off the light when abeam? 

    Y a. 2.3 miles
    N b. 3.1 miles
    N c. 3.9 miles
    N d. 4.5 miles
3293: Your vessel consumes 274 barrels of fuel per day at a speed of 17.5 knots. What will be the fuel consumption of your vessel at 13.5 knots? 

    Y a. 126 bbls
    N b. 163 bbls
    N c. 211 bbls
    N d. 253 bbls
3297: Your vessel consumes 236 barrels of fuel per day at a speed of 16.5 knots. What will be the fuel consumption of your vessel at 13.0 knots? 

    N a. 102 bbls
    Y b. 115 bbls
    N c. 147 bbls
    N d. 186 bbls
3609: Enroute from Rio to Montevideo, the true course is 215°; the gyro error is 2° west. A north wind causes 3° leeway. What course would you steer per gyrocompass to make good the true course? 

    Y a. 220°pgc
    N b. 214°pgc
    N c. 216°pgc
    N d. 210°pgc
3620: Your vessel is steering course 197°psc, variation for the area is 7°E, and deviation is 4°W. The wind is from the west, producing a 2° leeway. Which true course are you making good? 

    N a. 192°T
    N b. 196°T
    Y c. 198°T
    N d. 202°T
3764: 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 064°T, and the variation is 17°W. If the heading of your vessel at the time of the sighting is 094° per standard magnetic compass, what is the correct deviation? 

    N a. 4°E
    N b. 4°W
    N c. 13°E
    Y d. 13°W
10207: Your 2230 position is LAT 41°07.4'N, LONG 72°44.0'W. Assuming that there is no set and drift, what course must you steer per standard magnetic compass to leave Twenty-Eight Foot Shoal Lighted Buoy 1 mile abeam to starboard? 

    Y a. 086°psc
    N b. 091°psc
    N c. 094°psc
    N d. 098°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
11700: What is the true heading to steer outbound in Thimble Shoal Channel if your engines are turning for 8.0 knots, the current is 050°T at 1.0 knot and a northerly wind causes 3° of leeway? 

    Y a. 111°T
    N b. 104°T
    N c. 101°T
    N d. 098°T
12611: You are on course 262° per standard magnetic compass when you take the following bearings: Saybrook Breakwater Light - 338.5°psc Little Gull Island Light - 107.5°psc Horton Point Light - 240.0°psc What is your position? 

    N a. LAT 41°11.9'N, LONG 72°16.7'N
    Y b. LAT 41°12.6'N, LONG 72°17.2'W
    N c. LAT 41°13.0'N, LONG 72°17.7'W
    N d. LAT 41°12.1'N, LONG 72°17.3'W
12902: Your 1312 position is LAT 37°10.9'N, LONG 75°29.6'W. You are turning for 8.3 knots. What is your ETA at LAT 37°21.9'N, LONG 75°42.6'W? 

    N a. 1449
    N b. 1456
    Y c. 1502
    N d. 1511
13906: When approaching Block Island Sound from Long Island Sound, you will enter waters governed by the International Rules of the Road when you __________. 

    Y a. pass through The Race
    N b. cross the territorial sea boundary
    N c. exit Block Island Sound to the east or south
    N d. None of the above, as Long Island Sound is governed by the  International Rules of the Road
15113: At 1845, you obtain the following bearings:

Old Plantation Flats Light bearing 251° true
New Point Comfort Light bearing 334° true

Your latitude is __________. 

    N a. 37°10.7'N
    N b. 37°10.9'N
    N c. 37°11.0'N
    Y d. 37°11.2'N
15159: From your 1715, fix you steer 214°T at 12 knots. At 1800,
you take the following bearings:

Cape Charles Light bearing 296° true
Cape Henry light bearing 242° true

Your 1800 position is __________. 

    N a. LAT 37°02.8'N,  LONG 75°43.9'W
    Y b. LAT 37°02.9'N,  LONG 75°43.1'W
    N c. LAT 37°03.0'N,  LONG 75°43.3'W
    N d. LAT 37°03.1'N,  LONG 75°42.8'W
15240: At 1130, Horton Point Light bears 172° true at a range of 3.45nm

The fathometer reads 81 ft. Your position is __________. 

    N a. north of your intended track line
    N b. 41°09.4'N, 72°22.6'W
    N c. three miles southeast of Six Mile Reef Buoy "8A"
    Y d. 41°08.5'N, 72°27.3'W
15243: 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? 

    N a. 1318
    Y b. 1323
    N c. 1328
    N d. 1343
15313: From your noon position, if there is no set and drift, what is your course per standard magnetic compass to the "NCA"
(LL #375) buoy? 

    N a. 215°psc
    Y b. 217°psc
    N c. 219°psc
    N d. 221°psc
15541: 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) 

    N a. The light is visible at 2200
    N b. 2221
    Y c. 2236
    N d. You will not sight the light
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
15614: From your 1920 position, you change course to enter Chesapeake Channel between buoys 9 and 10. What is the course per standard magnetic compass (psc) ? 

    N a. 286°psc
    Y b. 283°psc
    N c. 280°psc
    N d. 274°psc
15909: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. What loran reading will ensure that you will remain clear of the 18' shoal located 1 mile NW of Falkner Island Light? 

    N a. 9960 W: not less than 14942
    N b. 9960 X: not more than 26452
    Y c. 9960 Y: not less than 44013
    N d. None of the above
15920: What chart should you use after you enter New London Harbor? 

    N a. 13211
    Y b. 13213
    N c. 13214
    N d. 13272
16058: At 1750, your position is LAT 37°14.5'N, LONG 76°22.9'W. What was the speed made good between 1730 and 1750? 

    N a. 7.5 knots
    N b. 7.8 knots
    N c. 8.1 knots
    Y d. 8.4 knots
16239: From your 2045 position, you set a course to pass 1.5 miles due east of the charted position of Hog Island Lighted Bell Buoy "12". The known set and drift in the area are 068°T at 3 knots. What is the course to steer, with no change in engine speed, to make good your desired course? 

    Y a. 200°T
    N b. 203°T
    N c. 206°T
    N d. 209°T
16369: As you pass between Trestle B and Trestle C of the Chesapeake Bay Bridge - Tunnel, you sight along Trestle C when it is in line. The gyro bearing is 051°. What is the gyro error by observation? 

    N a. 4°E
    N b. 2°E
    N c. 0°
    Y d. 2°W