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.

46: At 2342, on 25 August, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 9 mph?
74: You are turning for 7.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?
87: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 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?
218: 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. 199°pgc
    N b. 196°pgc
    Y c. 193°pgc
    N d. 190°pgc
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.
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
444: At 1110, you increase speed to 12 knots. What is your ETA at the new position? 

    N a. 1220
    Y b. 1215
    N c. 1208
    N d. 1157
448: At 2100, you set course of 000°T, speed 10 knots from LAT 41°07.0'N, LONG 71°30.0'W. Visibility is 5.5 n.m. What is the earliest time you can expect to sight Point Judith Light? (Use charted range of 20 miles as nominal range.) 

    N a. The light is visible at 2100.
    N b. 2106
    Y c. 2111
    N d. 2123
555: Your 0507 position is about 7 miles from Bridgeport, CT. What is the distance from this position to Newport, RI? 

    N a. 114 miles
    N b. 101 miles
    N c. 95 miles
    Y d. 88 miles
597: Which daymark will you see as you approach Natchez Beam Lt. (mile 364.8 AHP)? 

    N a. Red diamond
    N b. White square
    N c. Green square
    Y d. Red triangle
614: Your vessel departs Arkhangel'sk, from position LAT 64°32'N, LONG 40°31'E at 0236 zone time, on 19 August. It is bound for New York, at position LAT 40°42'N, LONG 74°01'W. The distance is determined to be 4,216 miles, and you estimate that you will average 13.0 knots. What is your estimated zone time of arrival? 

    N a. 1155, 31 August
    N b. 1755, 31 August
    Y c. 0655, 1 September
    N d. 1155, 1 September
625: You are on a voyage from Boston, MA, to the South Pass, LA. The distance is 1870 miles, and the speed of advance is 13.6 knots. You estimate 16.5 hours for bunkering enroute at Port Everglades, FL. If you sailed at 0836 hours (ZD +5), 26 February , what was your ETA (ZD +6) at the South Pass? 

    N a. 2336, 3 March
    N b. 1136, 4 March
    N c. 1236, 4 March
    Y d. 1736, 4 March
685: What company does NOT have a marine facility along the river bank in Madison Parish (mile 457.0 AHP)? 

    N a. Complex Chemical Co.
    N b. Delta Southern Railroads
    Y c. Baxter Wilson Steam
    N d. Farm Chemical
820: On 15 March , in DR position LAT 21°42.0'N, LONG 55°26.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 04h 02m 40s, and the chronometer error is 02m 24s fast. The sextant altitude (hs) is 66°15.6'. The index error is 2.8' on the arc, and your height of eye is 56 feet. What is the latitude at meridian transit? 

    N a. 21°12.0'N
    N b. 21°18.0'N
    N c. 21°24.4'N
    Y d. 21°32.0'N
1005: On 18 May , your 1030 ZT DR position is LAT 20°41'N, LONG 63°32'W. You are on course 106°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.

ZONE TIME GHA DECLINATION Ho
1204 61°54.6' N 19°37.6' 88°39.7'
1210 63°24.6' N 19°37.7' 88°59.2' 

    Y a. LAT 20°32.6'N, LONG 62°57.5'W
    N b. LAT 20°30.1'N, LONG 63°01.9'W
    N c. LAT 20°27.6'N, LONG 62°52.4'W
    N d. LAT 20°25.2'N, LONG 62°56.9'W
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
1138: After you get underway, what is the first river gage you will pass? 

    Y a. Donaldsonville
    N b. Head of Passes
    N c. Baton Rouge
    N d. Red River Landing
1193: On 26 September , your 0830 zone time DR position is LAT 23°04.0'N, LONG 129°16.0'E. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1158
    N b. 1205
    Y c. 1210
    N d. 1214
1239: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo? 

    N a. List of Buoys and Daymarks
    N b. U.S.C.G. Light List
    N c. Army Corps. of Engineers Navigation Chart
    Y d. None of the above
1262: On 27 September , your 0345 ZT DR position is LAT 26°18.0'S, LONG 4°18.0'W. You are on course 271°T at a speed of 15 knots. What will be the zone time of sunrise at your vessel? 

    N a. 0525
    N b. 0545
    N c. 0555
    Y d. 0605
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
1451: On 11 December , your 1816 ZT DR position is LAT 26°30.0'N, LONG 140°35.0'E. At that time, you observe Venus bearing 230°pgc. The chronometer reads 09h 14m 52s and the chronometer error is 01m 02s slow. The variation is 3.5°E. What is the gyro error? 

    N a. 2.2°E
    Y b. 3.3°E
    N c. 3.2°W
    N d. 4.2°W
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
1487: On 5 June , your 0420 zone time DR position is LAT 26°47.0'N, LONG 133°19.5'W. At that time, you observe Vega bearing 298.1°psc. The chronometer reads 01h 21m 17s, and the chronometer error is 02m 25s fast. The variation is 3.5°E. What is the deviation of the standard compass? 

    N a. 1.8°E
    N b. 5.2°E
    Y c. 1.8°W
    N d. 5.2°W
1652: On 16 April , in DR position LAT 28°07.0'N, LONG 81°47.0'W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 073.5°psc. The chronometer reads 10h 53m 41s and is 02m 23s slow. Variation in the area is 11°E. What is the deviation of the magnetic compass? 

    N a. 4.5°E
    N b. 4.9°W
    N c. 6.1°E
    Y d. 6.5°W
1833: What are the dimensions of the Port Allen Lock at Baton Rouge, LA? 

    N a. 75 feet x 1188 feet
    N b. 84 feet x 1180feet
    Y c. 84 feet x 1188 feet
    N d. 75 feet x 1180 feet
1898: On 22 May , your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 142°T at an observed altitude (Ho) of 23°10.2'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe? 

    N a. Markab
    N b. Diphda
    N c. Sabik
    Y d. Fomalhaut
1913: On 14 January , your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe? 

    Y a. Gienah
    N b. Kochab
    N c. Gacrux
    N d. Eltanin
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
2207: 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
2209: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge? 

    N a. 53.0 feet
    N b. 62.6 feet
    N c. 64.2 feet
    Y d. 68.0 feet
2320: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis? 

    N a. 48.0 feet
    Y b. 53.2 feet
    N c. 68.2 feet
    N d. 116.0 feet
2582: From your 1750 GPS position at LAT 41°15.6'N, LONG 072°11.5'W, you plot a course of 255°T at 8.5 kts. At what time would you see Falkner Island Light, if visibility is 10 miles? 

    N a. 1819
    Y b. 1850
    N c. 1910
    N d. 1917
2654: You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light? 

    Y a. 0420
    N b. 0423
    N c. 0426
    N d. 0429
3061: The propeller on a vessel has a diameter of 20.2 feet and a pitch of 19.0 feet. What would be the apparent slip if the vessel cruised 367 miles in a 24 hour day (observed distance) at an average RPM of 84? 

    Y a. +2.9%
    N b. -2.9%
    N c. +5.2%
    N d. -5.2%
3094: If the pitch of the propeller is 26.7 feet, and the revolutions per day are 131,717, calculate the day's run allowing 4% negative slip. 

    N a. 555.2 miles
    N b. 578.4 miles
    Y c. 601.6 miles
    N d. 649.4 miles
3111: You are turning 100 RPM, with propeller pitch of 25 feet, and an estimated negative slip of 5%. What is the speed of advance? 

    N a. 23.4 knots
    N b. 24.7 knots
    Y c. 25.9 knots
    N d. 26.3 knots
3287: While steaming at 16.5 knots, your vessel consumes 349 barrels of fuel oil per day. In order to reduce consumption to 189 barrels of fuel oil per day, what is the maximum speed the vessel can turn for? 

    N a. 12.1 knots
    Y b. 13.5 knots
    N c. 14.6 knots
    N d. 15.4 knots
3618: Your vessel is steering course 027° per standard magnetic compass (psc), variation for the area is 19°W, and deviation is 2°E. The wind is from the north-northwest, producing a 5° leeway. What true course are you making good? 

    N a. 005°T
    Y b. 015°T
    N c. 044°T
    N d. 049°T
10609: At 1922 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 10 knots. At 2019 your GPS position is 1 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift? 

    Y a. 343°T at 0.7 knot
    N b. 340°T at 1.2 knots
    N c. 164°T at 0.9 knot
    N d. 161°T at 1.1 knots
11405: At 2125 your GPS position is LAT 41°05.7'N, LONG 72°46.5'W. At 2208 your position is LAT 41°03.3'N, LONG 72°37.9'W. What was your course made good by standard magnetic compass? 

    Y a. 123°psc
    N b. 287°psc
    N c. 303°psc
    N d. 326°psc
11806: What course should you steer by standard magnetic compass between Mattituck Inlet and Branford Reef Light, if the set and drift of the current are 027° at 2.5 knots, and a northeasterly wind will cause 1° of leeway? Your engines are turning for 12 knots. 

    N a. 295°psc
    N b. 305°psc
    N c. 317°psc
    Y d. 320°psc
11907: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 130° at 1.2 knots, and a southerly wind causes 3° of leeway? 

    N a. 112°T
    Y b. 108°T
    N c. 105°T
    N d. 102°T
12703: You are on course 025° per standard magnetic compass when you take the following bearings: Point Judith Light - 072°psc Block Island North Point Light - 118°psc Watch Hill Light - 306°psc What s your position?) 

    N a. LAT 41°14.9'N, LONG 71°43.2'W
    N b. LAT 41°15.1'N, LONG 71°44.0'W
    Y c. LAT 41°15.4'N, LONG 71°43.1'W
    N d. LAT 41°15.6'N, LONG 71°42.8'W
12908: At 0919 you are inbound, approximately 3.3 miles east of Cape Henry with buoy "15" close aboard to port. What is your ETA between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel if you are making 11.3 knots? 

    N a. 1010
    Y b. 1014
    N c. 1019
    N d. 1025
14002: At 1630 your vessel exits Bonneville Lock steaming in a westerly direction. What speed must you average to arrive at the Interstate 5 highway bridge with an ETA of 2120? 

    N a. 6 mph
    N b. 7 mph
    Y c. 8 mph
    N d. 9 mph
14103: You are approaching Bonneville Lock and Dam and desire lockage. Which call sign should you use to contact the lock? 

    Y a. WUJ 33
    N b. WUJ 34
    N c. WUJ 41
    N d. WUJ 45
15070: As you enter New London Harbor, you are steering on the entrance range. The lights are in line over the bow as you are heading 352°pgc. What is the gyro error? 

    Y a. 2°E
    N b. 0°
    N c. 1°W
    N d. 3°W
15215: At 2015, you alter course to 154°pgc. What is the course per standard magnetic compass (psc)? 

    Y a. 162°psc
    N b. 157°psc
    N c. 152°psc
    N d. 142°psc
15460: At 0845, you are approaching the entrances to Thimble Shoal Channel. What channel must you use? 

    Y a. The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters), and you are not a passenger vessel.
    N b. The South Auxiliary Channel or Thimble Shoal Channel, but you must remain on the right hand side of the main channel.
    N c. The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12".
    N d. You are not permitted to use any of the channels, but must remain outside the buoyed channel line.
15663: At 0748, you change course to 160°T. Which loran reading will insure you clear Great Eastern Rock? 

    Y a. Nothing more than 9960-W-14645
    N b. Nothing more than 9960-X-25970
    N c. Nothing more than 9960-Y-43850
    N d. Nothing more than 9960-Y-43960
15814: At 0130, you obtain the following bearings:

Horton Point Lighthouse 078°T
Mattituck Breakwater Light tower 196°T

What were the course and speed made good between 0100 and 0130? 

    Y a. 246°T at 9.8 knots
    N b. 253°T at 9.4 knots
    N c. 259°T at 9.8 knots
    N d. 267°T at 9.4 knots
16361: At 0400, you take the following bearings:

Sand Shoal Inlet South Light bearing 305°pgc
Cape Charles Light bearing 241°pgc

What was the course made good since 0240? 

    N a. 182°T
    Y b. 185°T
    N c. 189°T
    N d. 192°T
16413: At 1104, Watch Hill Point Light is in line with Stonington Outer Breakwater Light, the range to the south tip of Watch Hill Point is 2.6 miles and the range to the beach is 1.9 miles. You are steering to make good 075°T, speed 10.0 knots. At 1110, you change course to head for a position of LAT 41°05.0'N, LONG 71°50.0'W. What is the true course? 

    N a. 185°
    N b. 187°
    Y c. 190°
    N d. 193°
16515: What action should you take to compensate for the above current? 

    N a. Continue on the same course and speed.
    Y b. Alter your course to the left.
    N c. Slow to 8.5 knots.
    N d. Alter your course to the right.
16611: At 0109 you get underway, and at 0112 you take the following set of bearings:

Branford Reef Light bearing 051°true
Stratford Point Light bearing 258°true

What is your 0112 position? 

    N a. LAT 41°11.2'N, LONG 72°51.7'W
    N b. LAT 41°11.4'N, LONG 72°50.5'W
    Y c. LAT 41°11.4'N, LONG 72°51.3'W
    N d. LAT 41°11.8'N, LONG 72°51.5'W