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.

62: The Greenville Gage reads 10.6 feet. The high point of your towboat is 54 feet above water. What is the vertical clearance as you pass under the Greenville Highway Bridge?
73: The area between Island 67 Upper Light (mile 623.1 AHP) and Sunflower Cut-off Foot Light (mile 624.8 AHP) is known as a __________.
89: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
115: After passing Wilkinson Lt. (mile 310.0 AHP) you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________. 

    N a. stay in the deepest water
    N b. slow down due to dredging operations
    N c. keep as close to the right descending bank as safety permits
    Y d. keep as close to the left descending bank as safety permits
159: You are turning for 6.8 mph and estimate the current at 1.0 mph. What is your speed over the ground? 

    N a. 8.8 mph
    N b. 8.2 mph
    Y c. 7.8 mph
    N d. 6.8 mph
265: At 0740, you take the following Radar Ranges:

Branford Reef Light @ 2.5 nm
New Haven Light @ 3.9 nm

What is your position? 

    Y a. LAT 41°12.4'N, LONG 72°51.5'W
    N b. LAT 41°12.6'N, LONG 72°51.8'W
    N c. LAT 41°12.7'N, LONG 72°51.9'W
    N d. LAT 41°12.2'N, LONG 72°52.0'W
315: From your 1430 fix, you order turns for 8 knots. You steer 045°T and experience no set and drift. At what time would you expect to have New Point Comfort Spit Light "4" abeam? 

    N a. 1510
    N b. 1504
    Y c. 1458
    N d. 1452
353: At 0550, engineering repairs are complete and speed is increased to 9.6 knots. At 0630, Falkner Island Light bears 023°pgc and Horton Point Light bears 097°pgc. From your 0630 fix you steer to make good a course of 086°T while turning for 9.6 knots. At 0700, Falkner Island Light bears 336.0°pgc and Horton Point Light bears 105.5°pgc. The radar range to the south tip of Falkner Island is 5.7 miles. Which statement is TRUE? 

    N a. Your course made good from 0630 to 0700 was 082°T.
    N b. The speed made good from 0630 to 0700 was 10.1 knots.
    Y c. You are making good your intended speed.
    N d. The current from 0630 to 0700 was 279°T at 0.6 knot.
371: You are steering 087°pgc and turning for 6.8 knots. At 0600, you take the following bearings:

Little Gull Island Light bearing 089.5° pgc
Bartlett Reef Light bearing 047° pgc

What is your 0600 position? 

    N a. LAT 41°11.2'N, LONG 72°14.6'W
    N b. LAT 41°11.7'N, LONG 72°14.4'W
    Y c. LAT 41°12.1'N, LONG 72°13.8'W
    N d. LAT 41°12.5'N, LONG 71°14.9'W
383: 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? 

    Y a. 24.4 miles
    N b. 23.9 miles
    N c. 23.7 miles
    N d. 20.4 miles
601: At 1210 zone time, on 1 December , you depart Seattle, LAT 47°36.0'N, LONG 122°22.0'W (ZD +8). You are bound for Guam, LAT 13°27.0'N, LONG 144°37.0'E, and you estimate your speed of advance at 20 knots. The distance is 4,948 miles. What is your estimated zone time of arrival at Guam? 

    N a. 1734, 11 December
    N b. 1934, 11 December
    N c. 0334, 12 December
    Y d. 1334, 12 December
655: On a North Pacific voyage, you wish to sail the shortest distance from LAT 46°05'N, LONG 124°00'W to LAT 44°00'N, LONG 150°00'E. You do not want to exceed 50°N latitude due to anticipated fog conditions. Which voyage plot meets these requirements? (Use gnomonic tracking chart WOXZC 5270) 

    N a. A great circle between departure and arrival with Mercator  legs north of the Aleutians
    N b. A great circle between departure and arrival with parallel  sailing where the track intersects the 50°N parallel
    Y c. A great circle to 50°N, 153°W, parallel sailing to 50°N, 173°W, then a great circle to arrival
    N d. A great circle from departure to the mid-longitude at 50°N, then another great circle to arrival
705: 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 (mile 253.6 AHP)? 

    Y a. 6.2 mph
    N b. 5.2 mph
    N c. 4.8 mph
    N d. 4.3 mph
751: On 16 July , at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant reads 26°57.5'. Your chronometer reads 05h 59m 16s, and your chronometer error is 01m 28s slow. Your height of eye is 48 feet, and the index error for your sextant is 1.3' off the arc. What is the latitude of your vessel from your observation of Polaris? 

    N a. 26°52.1'N
    N b. 26°58.8'N
    Y c. 27°36.1'N
    N d. 27°43.4'N
836: On 16 June , in DR position LAT 50°57.0'S, LONG 53°03.9'W (ZD+4), you take an ex-meridian observation of Acrux at lower transit. The chronometer time of the sight is 10h 08m 18s, and the chronometer error is 02m 12s fast. The sextant altitude (hs) is 23°49.0'. The index error is 1.1' off the arc, and your height of eye is 26 feet. What is the latitude at meridian transit? 

    Y a. 50°41.2'S
    N b. 51°02.2'S
    N c. 51°33.0'S
    N d. 51°41.2'S
1011: On 6 December , your 0800 zone time DR position was LAT 21°48.0'N, LONG 124°30.0'E. Your vessel was steaming on course 045°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 1012 ZT. The chronometer read 02h 10m 42s and was slow 01m 02s. The observed altitude (Ho) was 41°17.1'. LAN occurred at 1129 zone time.
The observed altitude (Ho) was 44°53.7'. What was the longitude of your 1200 zone time running fix? 

    N a. LONG 125°25.0'E
    N b. LONG 125°28.9'E
    N c. LONG 125°32.5'E
    Y d. LONG 125°35.2'E
1212: It is 21 November and you are keeping zone time +8. You are on course 082°T, speed 19 knots. Your 0830 DR position is LAT 24°14.8'N, LONG 133°35.5'W. What is the time of the second estimate of LAN by ship's clocks? 

    N a. 13h 35m 02s
    N b. 13h 03m 20s
    N c. 12h 35m 59s
    Y d. 12h 34m 51s
1250: What facility is not found near La Grange Towhead Light (538.2 AHP) on Greenville Harbour? 

    N a. Mississippi Limestone
    N b. Ergon, Inc.
    N c. American Commercial Barge Lines
    Y d. Greenville Casino Wharf
1268: On 25 December , your 0330 ZT DR position is LAT 25°15.0'N, LONG 32°16.0'W. You are on course 145°T at a speed of 20 knots. What will be the zone time of sunrise at your vessel? 

    N a. 0623
    N b. 0635
    N c. 0641
    Y d. 0647
1278: On 17 April , your vessel is enroute from the Panama Canal to Kobe, Japan. Your 0400 zone time DR position is LAT 26°12.0'N, LONG 126°12.0'W. Your vessel is on course 285°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel? 

    N a. 0535
    N b. 0541
    N c. 0552
    Y d. 0602
1341: What is the distance from the River Cement Co. Dock to the mouth of the Ohio River? 

    N a. 718.8 miles
    Y b. 780.8 miles
    N c. 953.5 miles
    N d. 981.5 miles
1392: On 3 February , your 0550 zone time DR position is LAT 26°16.0'N, LONG 112°05.0'W. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time? 

    N a. Spica, Antares, Saturn
    N b. Vega, Antares, Dubhe
    N c. Venus, Regulus, Vega
    Y d. Spica, Kochab, Rasalhague
1486: On 1 September , your 1115 zone time DR position is LAT 25°20.0'N, LONG 28°24.0'W. At that time, you observe the Sun bearing 160.5°psc. The chronometer reads 01h 14m 58s, and the chronometer error is 01m 17s fast. The variation is 13.5°W. What is the deviation of the standard compass? 

    Y a. 2.1°E
    N b. 4.1°E
    N c. 11.0°W
    N d. 11.0°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
1740: On what river is Ghent, Kentucky located? 

    N a. Tennessee
    N b. Mississippi
    N c. Missouri
    Y d. Ohio
1741: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks? 

    N a. 2044, 25 Aug
    N b. 0214, 26 Aug
    N c. 0745, 26 Aug
    Y d. 0845, 26 Aug
1765: The river will be temporarily closed to navigation at mile 531.3 AHP due to repairs to the bridge. This will occur at 1530, 5 January, and last for six hours. What minimum speed over the ground must you make from Red River Landing Gage in order not to be delayed? 

    Y a. 6.2 mph
    N b. 6.4 mph
    N c. 6.8 mph
    N d. 7.3 mph
1837: The Arkansas City Yellow Bend revetment on the LMR extends from mile _________. 

    Y a. 555.0-549.7 RDB
    N b. 549.0-548.5 RDB
    N c. 556.9-554.9 LDB
    N d. 548.5-546.5 LDB
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
2116: At 0300, your position is LAT 41°01.7'N, LONG 72°55.1'W. From this position you steer a course of 289° per standard magnetic compass at an engine speed of 10.0 knots. At what time can you first expect to see Stratford Shoal Middle Ground Light if the luminous range is 8.0 miles? 

    Y a. 0303
    N b. 0309
    N c. 0312
    N d. 0318
2155: On 17 May , at 0501 zone time, morning stars were observed, and the vessel's position was determined to be LAT 22°16.0'S, LONG 103°46.0'W. Your vessel is steaming at 24.0 knots on a course of 301°T. A sextant observation of the Sun's lower limb is made at 0845 zone time. The chronometer reads 03h 43m 32s, and the sextant altitude is 28°24.7'. The index error is 1.5' off the arc, and the chronometer error is 02m 02s slow. Your height of eye on the bridge is 85.5 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    N a. 051.0°T
    Y b. 052.5°T
    N c. 054.2°T
    N d. 055.7°T
2242: 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? 

    N a. 2.0°E
    N b. 2.0°W
    Y c. 1.2°E
    N d. 1.2°W
2458: You have steamed 560 miles at 23 knots and burning 524 barrels of fuel per day. You must decrease your consumption to 260 barrels per day with 316 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel? 

    N a. 16.3
    N b. 18.6
    N c. 19.9
    Y d. 21.6
2590: You have maneuvered for traffic and at 2215 you obtain the following radar information:

Middle Ground Light bearing 287° pgc @ 6.65 nm


What course must you steer to arrive at buoy "PJ", passing 0.5 nm off "Mt Misery Shoal"? 

    N a. 237° psc
    N b. 257° psc
    Y c. 261° psc
    N d. 265° psc
2675: At 1423 you are on course 072 T° at 12.2 knots, when you sight a rock awash bearing 070°T at a range of 3.6 miles. If you change course at 1427, what course would you steer to leave the rock 1.0 mile abeam to port? 

    N a. 049°
    N b. 054°
    N c. 086°
    Y d. 091°
10105: What is the course psc from Chesapeake Light to North Chesapeake Entrance Buoy NCA? 

    N a. 313°psc
    N b. 317°psc
    Y c. 321°psc
    N d. 325°psc
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
13500: The soundings on this chart are measured in __________. 

    Y a. feet
    N b. yards
    N c. meters
    N d. fathoms
14515: At 2150, your position is LAT 36°57.2'N, LONG 76°01.3'W. In this position on the chart, you note a light magenta line running in a direction of 030°T. This line indicates the limits of __________. 

    N a. a precautionary area
    Y b. a pilotage area
    N c. the Cape Henry Light red sector
    N d. chart 12222
15041: At 0741 you are still steering a course of 206° true, with a speed of 18 knots. At this time you observe Cape Charles Lighted Bell Buoy "14" bearing 222° true and Hog Island Lighted Bell Buoy "12" bearing 015° true . What were the set and drift experienced since 0725? 

    Y a. 259°true at 3.2 knots
    N b. 049°true at 2.5 knots
    N c. 240° true at 1.9 knots
    N d. 042°true at 3.3 knots
15169: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck? 

    Y a. 1.7 miles
    N b. 2.5 miles
    N c. 3.6 miles
    N d. 10.9 miles
15311: You leave York Spit Channel at buoy "14" at 0600 with an engine speed of 12 knots. You receive orders to rendezvous with the tug "Quicksilver" and her tow at Hog Island Bell Buoy "12". What is your ETA at the rendezvous point, if you pass through Chesapeake Channel to buoy "CBJ", through the outbound traffic separation lane to buoy "NCA"
(LL#375), and then to the rendezvous point? 

    N a. 0830
    N b. 0850
    Y c. 0910
    N d. 0935
15314: Your gyro and electronic gear are again operating. At 1710, Chesapeake Light bears 137°pgc at 6.6 miles. The current is setting 160°T at 2 knots. At your speed of 6 knots, what is your true course to steer to remain in the inbound traffic lane? 

    Y a. 269°
    N b. 265°
    N c. 261°
    N d. 250°
15340: At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°
T. At 1750 Race Rock Light bears 336°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718? 

    N a. 245°T at 0.9 knots
    N b. 245°T at 1.7 knots
    Y c. 065°T at 1.7 knots
    N d. 065°T at 0.9 knots
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
15662: At 0748, you take the following bearings:

Watch Hill Point Light bearing 026.5°pgc
Race Point Light bearing 275.5°pgc


What is the approximate depth of water under the keel at this position? 

    N a. 325 feet (98.5 meters)
    N b. 175 feet (53.0 meters)
    N c. 130 feet (39.4 meters)
    Y d. 112 feet (33.9 meters)
16062: At 1930, your vessel is between York River Entrance Channel Lighted Buoys "1YR" and "2". From this position, you change course to 142°pgc at an engine speed of 8.0 knots. At 2000, you take the following bearings: Chesapeake Channel Tunnel North Light - 131°pgc Thimble Shoal Light - 247°pgc
What were the set and drift between 1930 and 2000? 

    N a. 140°T at 0.2 knot
    Y b. 140°T at 0.4 knot
    N c. 320°T at 0.2 knot
    N d. 320°T at 0.4 knot
16245: At 2259 Cape Henry Light bears 250°T, Chesapeake Light bears 122°T, and North Chesapeake Entrance Lighted Whistle Buoy "NCA" has a radar range of 1.8 miles. Which statement is TRUE? 

    N a. The course made good is 226°T.
    N b. You are in the red sector of Cape Henry Light.
    N c. You are in a submerged submarine transit lane.
    Y d. Chesapeake Light is 7.6 miles off.
16358: What is the distance from the anchorage to point "A"? 

    N a. 13.9 miles
    Y b. 15.1 miles
    N c. 15.9 miles
    N d. 17.0 miles
16360: What is the course to steer per gyro compass from the anchorage to point "A" if westerly winds are causing 3° of leeway? 

    N a. 178°pgc
    N b. 182°pgc
    N c. 184°pgc
    Y d. 187°pgc
16439: While you are at anchor, what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position? 

    N a. A constant bearing on New Point Comfort Light.
    Y b. The bearing of Wolf Trap Light changing to the right
    N c. Increasing soundings
    N d. The bearing of Wolf Trap Light changing to the left