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.

99: What is the mile point of the Rosedale Gage?
196: What course per standard magnetic compass is (psc) the same as 247°pgc?
271: At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102°T. What is the approximate charted depth of the water?
293: At 1730, your position is LAT 37°13.9'N, LONG 76°26.4'W. You are steering course 088° per standard magnetic compass (psc) at an engine speed of 8.0 knots. What is your distance off Tue Marshes Light at 1730? 

    N a. 3.2 miles
    N b. 3.0 miles
    N c. 2.8 miles
    Y d. 2.6 miles
302: A vessel steams 720 miles on course 058°T from LAT 30°06.0'S, LONG 31°42.0'E. What are the latitude and longitude of the point of arrival by mid-latitude sailing? 

    N a. LAT 23°48'S, LONG 43°11'E
    Y b. LAT 23°44'S, LONG 43°07'E
    N c. LAT 23°38'S, LONG 43°03'E
    N d. LAT 23°34'S, LONG 43°00'E
376: You depart LAT 40°42.0'N, LONG 74°01.0'W, and steam 3365.6 miles on course 118°T. What is the longitude of your arrival by Mercator sailing? 

    N a. 24°29.0'W
    N b. 22°58.0'W
    Y c. 17°41.0'W
    N d. 10°46.0'W
420: At 0930, your position is LAT 41°16.5'N, LONG 71°41.4'W, and you are turning for 7 knots. Allowing 3° leeway for southerly winds and estimating the current as 035° at 0.3 knot, what is the course to steer (pgc) to point "B"? 

    Y a. 096°pgc
    N b. 094°pgc
    N c. 091°pgc
    N d. 089°pgc
504: At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy? 

    N a. _ .
    N b. _ _
    N c. . .
    Y d. . _
511: At 0130, your position is LAT 41°09.3'N, LONG 72°46.9'W when you change course to 086°T. If you make good 086°T, what is the closest point of approach to Twenty-Eight Foot Shoal Lighted Buoy? 

    N a. 1.2 mile
    N b. 1.1 mile
    Y c. 0.9 miles
    N d. 0.7 miles
549: In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 074°pgc. The helmsman was steering 303°pgc and 315° per standard magnetic compass at the time.

Which of the following is TRUE? 

    N a. The true line of the range is 072°.
    N b. The deviation based on the observation is 15°W.
    N c. The magnetic compass error is 12°W.
    Y d. The gyro error is exactly 1.5°E.
558: At 0530, you change course to 090°T and increase speed to 8.5 knots. What is the course to steer per gyro compass if northerly winds are causing 2° of leeway? 

    N a. 094°pgc
    N b. 092°pgc
    Y c. 090°pgc
    N d. 088°pgc
688: What is the distance from the Amoco Docks at Baton Rouge, LA, to Pittsburgh, PA? 

    N a. 727.9 miles
    N b. 981.5 miles
    N c. 1575.3 miles
    Y d. 1681.7 miles
809: On 7 November , your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the calculated latitude at LAN? 

    N a. 27°52.3'N
    N b. 27°53.4'N
    N c. 27°55.1'N
    Y d. 27°57.2'N
1092: On 3 April , your vessel's 1400 ZT DR position is LAT 20°08.0'N, LONG 147°45.0'W. You are steering course 023°T at 18.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. NP-0022

    N a. LAT 21°39.8'N, LONG 146°59.7'W
    Y b. LAT 21°40.0'N, LONG 147°03.2'W
    N c. LAT 21°41.8'N, LONG 147°05.5'W
    N d. LAT 21°41.8'N, LONG 147°01.5'W
1120: At 0850, 4 January, you pass the Gage at Natchez, MS which reads 26.8 feet. The low water reference plane (LWRP) for Natchez is 6.1 feet. What is the water level in relation to the low water reference plane? 

    Y a. 20.7 ft above
    N b. 20.7 ft below
    N c. 32.9 ft above
    N d. 32.9 ft below
1122: Which type of daymark will you see as you approach Old Levee Light (mile 385.2 AHP)? 

    N a. Green diamond
    N b. Red square
    Y c. Green square
    N d. Private aid - no daymark
1132: Which light will you be passing at 0059, on 22 September, if you make good 9.2 knots? 

    Y a. Obion Bar Lt.
    N b. Kate Aubrey Lt.
    N c. Trotter Lt.
    N d. Quaker Oats Lt.
1198: On 3 October , your 0830 zone time DR position is LAT 26°15.0'S, LONG 73°16.0'E. Your vessel is on course 280°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)? 

    Y a. 1201
    N b. 1158
    N c. 1155
    N d. 1152
1411: After you get underway, what is the first river gage you will pass? 

    N a. Head of Passes
    N b. Baton Rouge
    Y c. Bayou Sara
    N d. Red River Landing
1676: On 10 June , your vessel's 0519 zone time DR position is LAT 27°07.0'N, LONG 92°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 063.6° per standard magnetic compass. The variation in the area is 4.8°E. The chronometer reads 11h 17m 32s and is 01m 18s slow. What is the deviation of the compass? 

    N a. 5.6°E
    N b. 4.8°E
    N c. 4.2°W
    Y d. 4.8°W
1747: As you pass under the Greenville Highway Bridge, you estimate the current as 3.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph? 

    N a. 14.5 mph
    N b. 13.5 mph
    Y c. 12.5 mph
    N d. 11.5 mph
1804: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph? 

    Y a. 1718, 20 April
    N b. 1830, 20 April
    N c. 0028, 21 April
    N d. 0821, 21 April
1808: You are on map #4. What is the mile point of the facility known as Gulf Coast Grain Co.? 

    N a. mile 920 AHP
    N b. mile 921 AHP
    N c. mile 922 AHP
    Y d. mile 923 AHP
1885: On 26 November , your 0535 DR position is LAT 27°18.9'S, LONG 30°18.4'E. You observe an unidentified planet bearing 037°T at an observed altitude (Ho) of 50°06.4'. The chronometer reads 03h 33m 16s and is 01m 48s slow. What planet did you observe? 

    N a. Saturn
    N b. Jupiter
    Y c. Mars
    N d. Venus
1954: 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? 

    Y a. 1444, 27 Aug
    N b. 2214, 27 Aug
    N c. 0844, 28 Aug
    N d. 1454, 28 Aug
2172: On 11 October , at 0516 ZT, morning stars were observed, and the vessel's position was determined to be LAT 23°21.0'N, LONG 139°27.0'W. Your vessel is steaming at 14.0 knots on a course of 293°T. A sextant observation of the Sun's lower limb is made at 0927 ZT. The chronometer reads 06h 30m 21s, and the sextant altitude (hs) is 39°48.7'. The index error is 2.0' on the arc, and the chronometer error is 02m 56s fast. Your height of eye on the bridge is 63.0 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    N a. 116.2°T
    Y b. 123.4°T
    N c. 126.2°T
    N d. 128.4°T
2182: On 18 August , at 0600 ZT, morning stars were observed, and the vessel's position was determined to be LAT 19°48'N, LONG 108° 34'W. Your vessel is steaming on course 166°T at a speed of 16 knots. An observation of the Sun's lower limb is made at 1036 ZT. The chronometer reads 05h 34m 48s and is slow 01m 24s. What is the computed altitude (Hc) and azimuth (Zn) for this 1036 ZT observation using the assumed position method? 

    N a. Hc 65°18.5', Zn 102.1°
    Y b. Hc 65°14.8', Zn 100.4°
    N c. Hc 65°11.3', Zn 099.4°
    N d. Hc 65°07.2', Zn 101.2°
2595: At 0145 you take on the pilot and are inbound Port Jefferson. The ship's heading is 147°pgc when lined up on the Port Jefferson range. What is your gyro error? 

    Y a. 1° W
    N b. 1° E
    N c. 2° E
    N d. 0°
2657: You are steering 349°T, and a light is picked up dead ahead at a distance of 17.2 miles at 2122. You change course to pass the light 4.5 miles off abeam to port. If you are making 19.5 knots, what is your ETA at the position 4.5 miles off the light? 

    N a. 2207
    N b. 2210
    Y c. 2213
    N d. 2216
2707: You are underway on course 128°T at a speed of 17.6 knots. You sight a daymark bearing 126°T at a radar range of 4.3 miles at 1649. If you change course at 1654, what is the course to steer to leave the daymark abeam to starboard at 0.5 mile? 

    Y a. 113°T
    N b. 116°T
    N c. 119°T
    N d. 136°T
3112: While enroute from Montevideo to Walvis Bay a vessel's course is 116°psc. The variation for the locality is 25°W and the deviation is 6°W. What is the true course made good if a southerly wind produces 1° leeway? 

    Y a. 084°T
    N b. 086°T
    N c. 148°T
    N d. 085°T
3283: While steaming at 17.5 knots, your vessel consumes 378 barrels of fuel oil per day. In order to reduce consumption to 194 barrels of fuel oil per day, what is the maximum speed the vessel can turn for? 

    N a. 12.5 knots
    Y b. 14.0 knots
    N c. 15.5 knots
    N d. 16.8 knots
3468: You are underway on course 215°T at 12 knots. The current is 000°T at 2.3 knots. What is the speed being made good? 

    N a. 8.5 knots
    Y b. 10.2 knots
    N c. 10.9 knots
    N d. 11.2 knots
11104: What is the time of the first PM (Daylight Savings Time) maximum ebb current at Plum Gut on 10 August 1983? 

    N a. 1231
    N b. 1249
    N c. 1340
    Y d. 1445
11301: At 1256 your GPS position is LAT 36°57.0'N, LONG 75°41.0'W. At 1331 your position is LAT 37°07.5'N, LONG 75°39.1'W. What was the speed made good between the fixes? 

    N a. 14.6 knots
    N b. 15.2 knots
    N c. 16.6 knots
    Y d. 18.3 knots
11504: At 1016 your position is LAT 41°07.6'N, LONG 71°38.5'W. At 1116 your position is LAT 41°01.4'N, LONG 71°29.4'W. What was the course made good between the two positions? 

    Y a. 132°T
    N b. 135°T
    N c. 140°T
    N d. 143°T
13009: Your 1830 position is LAT 41°05.4'N, LONG 72°59.4'W. You are making turns for 9 knots. What is your ETA at Mattituck Inlet? 

    Y a. 2044
    N b. 2052
    N c. 2059
    N d. 2106
14004: At 1745 Lady Island Upper Range is in line dead astern and Washougal Lower Range is in line on the starboard bow. You are steaming in an easterly direction. What speed must you average to arrive abeam of Cape Horn Light No. 67 at 1839? 

    N a. 9.3 mph
    N b. 9.8 mph
    Y c. 10.2 mph
    N d. 10.8 mph
14202: What is the minimum clearance for the bridge across the entrance to the Wind River at Home Valley, WA.? 

    N a. 14 feet
    Y b. 26 feet
    N c. 34 feet
    N d. 38 feet
15043: At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220° true at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots? 

    N a. 0826
    N b. 0831
    Y c. 0837
    N d. 0846
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
15157: If there is no current, what is the course per gyro compass from your 1600 position to point "A" located 0.5 mile due east of Hog Island Lighted Bell Buoy "12"? 

    N a. 190°pgc
    N b. 193°pgc
    N c. 196°pgc
    Y d. 199°pgc
15364: At 0615, Stratford Point Light bears 292°pgc, Falkner Island Light bears 052°pgc, and Branford Reef Light bears 018°pgc. What was the current since 0530? 

    Y a. 083° at 1.2 knots
    N b. 083° at 0.9 knots
    N c. 263° at 1.2 knots
    N d. 263° at 0.9 knots
15512: At 1850, you obtain the following bearings and distances:

Montauk Point 189°pgc 8.7 miles
Watch Hill Light 340°pgc 5.7 miles

What true course did you make good between 1830 and 1850? 

    N a. 289°T
    Y b. 294°T
    N c. 299°T
    N d. 307°T
15770: At 0930, your position is LAT 41°16.5'N, LONG 71°41.4'W, and you are turning for 7 knots. Allowing 3° leeway for northerly winds and estimating the current as 035° at 0.3 knot, what is the course to steer (pgc) to point "B"? 

    N a. 084°pgc
    Y b. 086°pgc
    N c. 091°pgc
    N d. 094°pgc
16014: From your 0430 position, what is the course per standard magnetic compass to a position where Twenty-eight foot Shoal lighted buoy "TE" is abeam to port at 1 mile? 

    N a. 082.5°
    N b. 086.0°
    N c. 098.0°
    Y d. 101.5°
16044: At 1038 Branford Reef Light bears 019°pgc, Falkner Island Light bears 075°pgc, and the radar range to Branford Reef Light is 3.0 miles. Which statement is TRUE of your 1038 position? 

    N a. You are required by regulation to change course to avoid steaming through the dumping ground.
    N b. You are making more speed over the ground, since your 1022 fix, than indicated by your engine RPM.
    N c. You are abeam of Townshend Ledge
    Y d. Your fathometer reads about 25 feet.
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
16438: Chesapeake Channel is temporarily closed to traffic.
At 2215 you anchor on the following bearings:

Wolf Trap Light 358°pgc
Light "HH" 301°pgc
New Point Comfort Light "2" 263°pgc

What is your 2215 position? 

    Y a. LAT 37°18.3'N, LONG 76°10.9'W
    N b. LAT 37°18.2'N, LONG 76°11.2'W
    N c. LAT 37°18.1'N, LONG 76°10.8'W
    N d. LAT 37°18.0'N, LONG 76°11.2'W
16469: As you pass between trestle "B" and trestle "C" of the Chesapeake Bay Bridge - Tunnel, you sight along the trestle "C" when it is in line. The trestle bears 057° per standard magnetic compass while the vessel is heading 320°T. From this you know the __________. 

    Y a. vessel should be swung to check the deviation table
    N b. compass error is 12°W
    N c. deviation table is correct for that bearing
    N d. deviation is 10°W
16640: At 0445 you take the following lines of position:

Montauk Point Light 292°pgc
Block Island Southeast Point Light 024°pgc

What was the current encountered since your 0400 fix? 

    N a. 004°, 0.7 knot
    Y b. 004°, 0.9 knot
    N c. 184°, 0.7 knot
    N d. 184°, 0.9 knot
16845: After the pilot boards, he tells you the gyro has a 2°E error. If this is true, what should the bearing be along Trestle C of the Chesapeake Bay Bridge-Tunnel as your vessel passes abeam of it? 

    N a. 052°pgc
    N b. 049°pgc
    Y c. 047°pgc
    N d. 045°pgc