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.

89: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
152: How long will it take you to go from the Memphis Gage to your destination in New Orleans, LA, if you estimate the average current on this segment of the route to be 2.0 mph and you increase the engine turns to 8.5 mph.
190: On 2 January you observe the lower limb of the Sun at a sextant altitude (hs) of 35°50.4'. The index error is 0.8' on the arc. The height of eye is 24 feet (7.3 meters). What is the observed altitude (Ho)?
329: The engineer has advised that it will be necessary to secure the gyrocompass and the electronic equipment. From your 0315 position, what is your course per standard magnetic compass to York Spit Channel Buoy "38", if there is no current? 

    N a. 218°psc
    Y b. 216°psc
    N c. 214°psc
    N d. 212°psc
336: What speed have you made good from 1710 to 1810? 

    Y a. 6.3 knots
    N b. 5.5 knots
    N c. 4.9 knots
    N d. 4.2 knots
382: You arrive at Cape Charles City at 1700 and depart at 1800. You are underway in Chesapeake Bay and encounter heavy fog. At 1830, you obtain the following radar information:

Old Plantation Flats Light bearing 041.5° true @ 1.9 nm

What is your 1830 position? 

    N a. LAT 37°10.3'N, LONG 76°04.5'W
    N b. LAT 37°10.3'N, LONG 76°06.5'W
    N c. LAT 37°12.3'N, LONG 76°06.5'W
    Y d. LAT 37°12.3'N, LONG 76°04.4'W
502: At 2142, you take the following bearings:

Stratford Point Light 331°T
Stratford Shoal Middle Ground Light 280°T
Old Field Point Light 223°T

What is your 2142 position? 

    N a. LAT 41°02.7'N, LONG 73°01.2'W
    Y b. LAT 41°03.0'N, LONG 73°01.7'W
    N c. LAT 41°03.1'N, LONG 73°01.3'W
    N d. LAT 41°03.3'N, LONG 73°01.9'W
539: Determine the distance from LAT 59°12'N, LONG 14°00'W to LAT 59°12'N, LONG 03°20'W by parallel sailing. 

    N a. 324.2 miles
    N b. 325.4 miles
    Y c. 327.7 miles
    N d. 328.9 miles
541: You depart LAT 16°24'S, LONG 169°38'W, for LAT 16°24'S, LONG 174°52'E. What are the course and distance by parallel sailing? 

    N a. 090°T, 301 miles
    N b. 090°T, 892 miles
    N c. 270°T, 301 miles
    Y d. 270°T, 892 miles
652: On a voyage via the southern tip of Nova Scotia (LAT 43°20'N, LONG 65°35'W) you wish to sail the shortest route to La Coruna, Spain (LAT 43°20'N, LONG 8°24'W). Which of the following will require you to plot a composite sailing? (Use gnomonic tracking chart WOXZC 5274) 

    N a. Shoals extending 15 miles from Sable Island
    N b. Sea ice reported 68 miles ESE of St. John's, Newfoundland
    Y c. Icebergs reported extending west to west-northwest from  LAT 47°00'N, LONG 35°00'W
    N d. Naval exercises using live ammunition being conducted within a 150 mile radius of LAT 49°00'N, LONG 20°00'W
738: On 24 September , your 1841 zone time DR position is LAT 25°15.0'N, LONG 129°34.5'E. At that time you observe Polaris with a sextant altitude (hs) of 25°20.8'. The chronometer time of the sight is 09h 38m 12s, and the chronometer error is 03m 12s slow. The index error is 4.3' off the arc, and the height of eye is 52.0 feet. What is your latitude by Polaris? 

    N a. 24°28.4'N
    N b. 25°16.0'N
    Y c. 25°37.6'N
    N d. 25°42.3'N
1079: On 12 Dec. , your 1830 ZT DR position is LAT 24°16.0'S, LONG 41°18.0'W. You are on course 235°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1930 running fix. NP-0009

    N a. LAT 24°12.5'S, LONG 41°10.9'W
    Y b. LAT 24°16.9'S, LONG 41°18.2'W
    N c. LAT 24°25.2'S, LONG 41°39.9'W
    N d. LAT 27°46.9'S, LONG 41°31.2'W
1104: On 19 November , your 0200 zone time DR position is LAT 20°29.0'N, LONG 150°21.3'E. You are on course 136°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0033

    N a. LAT 19°30.1'N, LONG 151°06.0'E
    N b. LAT 19°31.7'N, LONG 151°04.9'E
    Y c. LAT 19°33.0'N, LONG 151°10.0'E
    N d. LAT 19°35.8'N, LONG 151°13.6'E
1166: At 1032 on 24 June, you pass Carolina Landing Light(mile 508.8 AHP). What has been the average current since 2350, 23 June, if you have been making turns for 9.0 mph? 

    N a. 8.5 mph
    N b. 5.7 mph
    N c. 1.5 mph
    Y d. 0.5 mph
1241: At 1554, on 25 May, you pass Huntington Point Light (mile 555.2 AHP). What was your average speed since departing Amoco Pipeline Co. DockS (253.6 AHP)? 

    N a. 6.9 mph
    Y b. 6.2 mph
    N c. 4.8 mph
    N d. 4.3 mph
1287: As you approach Buckridge Light (mile 412.5 AHP),
which type of daymark would you see on the light structure? 

    N a. Red diamond
    N b. Red triangle
    Y c. Green square
    N d. Green diamond
1343: At 1019, on 10 March, you pass under the Greenville Bridge (mile 531.3 AHP). What was your average speed since departing River Cement Co. Dock? 

    Y a. 7.2 mph
    N b. 6.8 mph
    N c. 6.5 mph
    N d. 6.2 mph
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
1499: On 16 June , your 0430 zone time DR position is LAT 29°24.0'S, LONG 36°16.0'E. At that time, you observe Vega bearing 341.0°psc. The chronometer reads 02h 32m 06s, and the chronometer error is 01m 54s fast. The variation is 20.5°W. What is the deviation? 

    N a. 3.2°E
    N b. 3.2°W
    Y c. 2.4°W
    N d. 2.8°E
1500: On September 9 , your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error? 

    Y a. 0.7°E
    N b. 1.2°E
    N c. 0.8°W
    N d. 9.4°W
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
1868: On 12 June , your 1945 DR position is LAT 21°47.0'N, LONG 46°52.0'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 130°T at a sextant altitude (hs) of 45°21.2'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 10h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe? 

    N a. Theta Carinae
    N b. Epsilon Leonis
    Y c. Beta Librae
    N d. Zeta Puppis
2216: If your vessel is making turns for 7.5 mph with an estimated average current of 1.5 mph, what is your ETA at the dock in Angelina, LA? 

    N a. 0516, 28 Dec
    Y b. 1621, 28 Dec
    N c. 0516, 29 Dec
    N d. 1621, 29 Dec
2331: What is the coastwise distance from your 0731 fix to Wilmington, DE (LAT 39°43.2'N, LONG 75°31.5'W)? 

    N a. 339 miles
    N b. 309 miles
    N c. 245 miles
    Y d. 221 miles
2454: What is the width of the widest span of the Cairo Highway Bridge (Upper Mississippi River mile 1.3)? 

    N a. 800 feet
    Y b. 675 feet
    N c. 625 feet
    N d. 503 feet
2457: You have steamed 369 miles at 16 knots and burning 326 barrels of fuel per day. You must decrease your consumption to 212 barrels per day with 271 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel? 

    N a. 11.1
    N b. 12.9
    N c. 13.6
    Y d. 15.1
2674: You are steaming on course 126°T at 14.8 knots. At 1022 you sight a buoy bearing 128°T, at a range of 4.8 miles. If you change course at 1026, what true course will you steer to leave the buoy 0.5 mile abeam to port? 

    Y a. 136°
    N b. 133°
    N c. 122°
    N d. 119°
2683: You are underway on a course of 135°pgc at 15 knots, and you sight a lighthouse dead ahead at a range of 12.5 miles at 1145. What course would you steer to leave the lighthouse 3.0 miles off your port beam? 

    N a. 117°pgc
    N b. 121°pgc
    Y c. 149°pgc
    N d. 154°pgc
3085: You must average 16.25 knots to reach port at a designated time. Your propeller has a pitch of 21'08", and you estimate 4% negative slip. How many RPM's must you average to arrive on time? 

    Y a. 73 RPM
    N b. 77 RPM
    N c. 82 RPM
    N d. 88 RPM
3100: The pitch of the propeller on your vessel is 19'09". You estimate the slip at -3%. If you averaged 82 RPM for the day's run, how many miles did you steam? 

    N a. 370.8
    N b. 373.6
    N c. 393.7
    Y d. 395.3
3650: The true course between two points is 194°. Your gyrocompass has an error of 2°W and you make an allowance of 1° leeway for a southwest wind. What gyro course should you steer to make the true course good? 

    N a. 193°pgc
    N b. 195°pgc
    Y c. 197°pgc
    N d. 199°pgc
3651: The true course between two points is 337°. Your gyrocompass has an error of 3°E and you make an allowance of 5° leeway for a west wind. Which gyro course should be steered to make the true course good? 

    Y a. 329°pgc
    N b. 335°pgc
    N c. 339°pgc
    N d. 345°pgc
3654: You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 07h 59m 54s. When compared to the chronometer, the comparing watch reads 08h 00m 00s, and the chronometer reads 08h 00m 06s. What is the chronometer error? 

    N a. 0m 06s slow
    N b. 0m 06s fast
    N c. 0m 12s fast
    Y d. No error
3755: 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 186°T, and the variation is 11°W. If the heading of your vessel at the time of the sighting is 193° per standard magnetic compass, what is the correct deviation? 

    Y a. 4°E
    N b. 4°W
    N c. 7°E
    N d. 7°W
4016: 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 004°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324° 

    N a. 1.5°W
    N b. 0.5°W
    N c. 0.0°
    Y d. 1.0°E
11306: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 1950 your position is LAT 36°59.5'N, LONG 75°37.0'W. What is the speed made good? 

    N a. 5.6 knots
    N b. 8.2 knots
    N c. 9.1 knots
    Y d. 10.9 knots
11811: What is the true course to steer between Horton Pt. Light and a position 2 miles due south of Branford Reef Light, if the set and drift of the current are 40°T at 1.5 knots, and an easterly wind will cause 3° of leeway? Your engines are making turns for 12 knots. 

    N a. 277°T
    N b. 283°T
    Y c. 287°T
    N d. 291°T
12210: You sight New Haven Outer Channel Range Rear Light in line with the Outer Channel Range Front Light bearing 343° per standard magnetic compass. What is your compass error? 

    N a. 5°E
    N b. 5°W
    N c. 9°E
    Y d. 9°W
14204: The mooring float at Beacon Rock State Park is restricted to pleasure boats and to periods not to exceed __________. 

    N a. 12 hours
    N b. 24 hours
    Y c. 36 hours
    N d. 48 hours
15046: 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? 

    N a. 3°E
    N b. 1°E
    Y c. 1°W
    N d. 9°W
15061: Falkner Island Light is shown __________. 

    N a. 46 feet (13.9 meters) above sea level
    N b. only from 1 June to 10 October
    Y c. from a white octagonal tower
    N d. with a six-second period
15068: Long Sand Shoal __________. 

    N a. shoals gradually on the north and south sides
    Y b. is hard and lumpy
    N c. shows breakers when northerly winds exceed 10 knots
    N d. has gray sand with scattered shells
15117: At 1930, you take a fix using the following radar ranges:

York Spit Light - 3.6 miles
New Point Comfort Spit Light "2" - 2.0 miles
York Spit Swash Channel Light "3" - 2.5 miles

Your longitude is __________. 

    N a. 76°16.5'W
    Y b. 76°16.8'W
    N c. 76°17.0'W
    N d. 76°17.2'W
15446: You are abeam of buoy "18" at 2325. What is your ETA at Baltimore if you average 9.5 knots? 

    N a. 1342
    Y b. 1400
    N c. 1424
    N d. 1456
15470: At 1119, Wolf Trap Light bears 268°T at 4.4 miles by radar. What were the set and drift since your 1037 fix? 

    N a. 178°, 0.5 knot
    N b. 358°, 0.5 knot
    N c. 178°, 0.7 knot
    Y d. 358°, 0.7 knot
15510: From your 1800 position you steer a course of 350°psc at a speed of 10.0 knots. At 1830, your position is LAT 41°11.7'N, LONG 71°45.8'W. What are the set and drift of the current? 

    N a. 029°T, 0.7 knot
    Y b. 029°T, 1.4 knots
    N c. 209°T, 0.7 knot
    N d. 209°T, 1.4 knots
15564: What was the current between 0520 and 0600? 

    N a. 178° at 0.8 knot
    N b. 178° at 1.2 knot
    N c. 358° at 0.8 knot
    Y d. 358° at 1.2 knots
15566: At 0520 you take the following observations:

Point Judith Light 036°pgc
Point Judith Harbor of Refuge
Main Breakwater Center Light 312°pgc

What is the position of your 0520 fix? 

    Y a. LAT 41°20.8'N, Long 71°29.7'W
    N b. LAT 41°20.8'N, Long 71°30.0'W
    N c. LAT 41°20.6'N, Long 71°30.0'W
    N d. LAT 41°20.5'N, Long 71°29.8'W
15907: At 0720, you are in the outer channel between buoy "1" and buoy "2" and change course to pass Townshend Ledge Lighted Gong Buoy "10A" abeam to port at 200 yards. What is your ETA off the buoy? 

    N a. 0734
    Y b. 0738
    N c. 0741
    N d. 0745
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
16211: From point "A", you lay out an intended track line to a point where Block Island North Light bears 180°T at 2.9 miles (Point "B"). What is the length of this leg of the voyage? 

    N a. 20.4 miles
    N b. 23.7 miles
    N c. 23.9 miles
    Y d. 24.4 miles
16443: As you transit the Chesapeake Bay Bridge and Tunnel, you take a gyro bearing of trestle C when it is in line. The gyro bearing was 050°. At that time, the helmsman noted that he was heading 139°pgc and 146° per standard magnetic compass. What is the deviation? 

    Y a. 2°E
    N b. 0°
    N c. 2°W
    N d. 4°W
16561: From your 1830 fix, you come left to a course of 290°T.
Which statement concerning Watch Hill Light is TRUE? 

    N a. The nominal range of its white light is 16 miles.
    Y b. It displays both red and white lights.
    N c. Its horn blasts every 15 seconds in fog.
    N d. Its geographic range is 18.5 miles at a 35-foot (10.7 meters) height of eye.
16563: From your 1850 fix, you come left to a course of 280°T,
while maintaining a speed of 10 knots. Which combination of available Loran-C lines would be best for position determination? 

    Y a. 9960-Y and 9960-W
    N b. 9960-X and 9960-Y
    N c. 9960-W and 9960-X
    N d. All 3 combinations are equal.
16708: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass? 

    Y a. 263°psc
    N b. 258°psc
    N c. 233°psc
    N d. 227°psc