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.

118: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN. You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
173: At 2015, you alter course to 154°pgc. What is the course per standard magnetic compass (psc)?
222: From your 1815 position, you want to make good a course of 263°T. Your engines are turning RPM's for 12 knots. The current is 050°T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light?
299: 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 2001, you obtain the following information:

Chesapeake Channel Tunnel North Light - 131°pgc; Thimble Shoal Light - 248°pgc

What were the set and drift between 1930 and 2001? 

    Y a. 127° at 0.5 knot
    N b. 127° at 1.1 knot
    N c. 307° at 1.1 knot
    N d. 307° at 0.5 knot
322: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.) 

    N a. 2355
    Y b. 2344
    N c. 2335
    N d. 2324
359: You are turning for 9 knots, a westerly wind is causing 3°
of leeway, and the current is 320°T at 1.2 knots. What true course should you steer to remain in the northern leg of York Spit Channel? 

    N a. 203°T
    N b. 197°T
    Y c. 194°T
    N d. 191°T
393: A vessel at LAT 32°14.7'N, LONG 66°28.9'W, heads for a destination at LAT 36°58.7'N, LONG 75°42.2'W. Determine the distance by Mercator sailing. 

    N a. 241.2° miles
    N b. 270.2° miles
    N c. 300.2° miles
    Y d. 538.2° miles
432: Which chart would you use for more detailed information on New Haven Harbor? 

    Y a. 12371
    N b. 12370
    N c. 12372
    N d. 12373
452: Determine the great circle distance and initial course from LAT 35°17.6'N, LONG 144°23.0'E to LAT 47°36.0'N, LONG 124°22.0'W. 

    N a. 3946 miles, 312°T
    Y b. 3931 miles, 048°T
    N c. 3881 miles, 042°T
    N d. 3718 miles, 318°T
486: What is your speed from your 0630 position, with Buoy "PI" close abeam, to your 0654 position? 

    N a. 11.4 knots
    Y b. 10.5 knots
    N c. 9.3 knots
    N d. 8.2 knots
576: What is indicated by the dashed magenta line crossing York Spit Channel between buoys "20" and "22"? 

    N a. You are crossing the demarcation line between the COLREGS and the Inland Rules.
    N b. The line indicates a submarine cable, and you should not anchor in the area.
    Y c. The line marks the limits of a regulated area.
    N d. It marks the range between Ft. Wool Light and Cape Charles Harbor Range, Rear Light.
580: At 1037, you are on course 010°T at 10 knots, when you take the following lset of bearings:

Old Plantation Flats Light bearing 123° pgc
New Point Comfort Light bearing 285.8° pgc
Wolf Trap Light bearing 338° pgc

What is your 1037 position? 

    N a. LAT 37°15.9'N, LONG 76°07.9'W
    N b. LAT 37°15.9'N, LONG 76°07.7'W
    Y c. LAT 37°16.1'N, LONG 76°07.4'W
    N d. LAT 37°16.3'N, LONG 76°07.2'W
604: At 1820 zone time, on 21 March , you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Melbourne, LAT 37°49.2'S, LONG 144°56.0'E, and you estimate your speed of advance at 21 knots. The distance is 6,970 miles. What is your estimated zone time of arrival at Melbourne? 

    N a. 1214, 4 April
    N b. 2214, 4 April
    Y c. 0814, 5 April
    N d. 1314, 5 April
643: Which company does NOT have a marine facility in Rosedale harbor (mile 585 AHP)? 

    N a. Sanders Elevator Corp
    N b. Rosedale-Boliver County Port Commission
    Y c. T.L. James
    N d. Cives Steel Company
739: On 29 April , your 1913 zone time DR position is LAT 22°09.0'N, LONG 56°16.0'W. At that time you observe Polaris with a sextant altitude (hs) of 22°25.8'. The chronometer time of the sight is 11h 11m 14s, and the chronometer error is 02m 18s slow. The index error is 1.5' off the arc, and the height of eye is 61.5 feet. What is your latitude by Polaris? 

    N a. 21°39.9'N
    N b. 21°55.7'N
    Y c. 22°39.9'N
    N d. 22°48.8'N
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
1217: It is 31 October , and you are keeping zone time -12. You are on course 095°T, speed 24 knots. Your 0730 DR position is LAT 29°20.0'N, LONG 178°54.0'E. What is the time of the second estimate of LAN by ship's clocks? 

    N a. 11h 24m 19s
    Y b. 11h 40m 55s
    N c. 12h 12m 16s
    N d. 12h 40m 02s
1294: What are the light characteristics of Greenwood Light (mile 288.6 AHP)? 

    N a. Fixed red light
    Y b. 2 red flashes every 5 seconds
    N c. 1 red flash every 4 seconds
    N d. 2 white flashes every 4 seconds
1661: On 11 May , in DR position LAT 28°13.7'N, LONG 168°36.3'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 283°psc. The chronometer reads 07h 13m 19s and is 02m 56s slow. Variation in the area is 13°E. What is the deviation of the standard magnetic compass? 

    N a. 5.2°W
    Y b. 5.6°W
    N c. 7.4°E
    N d. 7.8°E
1781: At 1524 ZT, on 14 June , in DR position LAT 30°51'N, LONG 30° 02'W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 103.9°pgc. The variation is 10°W. What is the gyro error? 

    N a. 1.8°W
    N b. 2.4°E
    N c. 2.2°E
    Y d. 2.0°E
1881: On 13 September , your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E, when you observed a faint unidentifiable star through a hole in the clouds. The star bore 148.0°T at a sextant altitude (hs) of 32°24.3'. The chronometer read 11h 24m 39s and is 05m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe? 

    N a. Beta Gruis
    Y b. Alpha Tucanae
    N c. Beta Aquarii
    N d. Alpha Indi
1904: On 22 March , your 0519 DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 115°T at an observed altitude (Ho) of 54°52.8'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe? 

    Y a. Altair
    N b. Enif
    N c. Menkar
    N d. Rigel
2005: On 17 July , your 1951 zone time DR position is LAT 24°26.0'N, LONG 51°16.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time? 

    N a. Hadar, Deneb, Alphard
    N b. Regulus, Venus, Antares
    N c. Mars, Vega, Dubhe
    Y d. Kochab, Jupiter, Rasalhague
2023: On 1 October , you determine the zone time of evening twilight will be 1835. Your DR position at this time is LAT 27°18.0'N, LONG 48°52.0'W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time? 

    N a. Altair, Rasalhague, Vega
    Y b. Alphecca, Kochab, Deneb
    N c. Diphda, Hamal, Mirfak
    N d. Antares, Rigil Kentaurus, Peacock
2056: What are the color and shape of Togo Island daymark at mile 415.0 AHP? 

    Y a. Green - Square
    N b. Green - Diamond
    N c. Red - Triangle
    N d. Red - Square
2092: At your current speed of 23 knots you only have enough fuel remaining to travel 386 miles. You must travel 785 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination? 

    N a. 19.3
    N b. 17.7
    Y c. 16.1
    N d. 14.5
2166: On 10 January , at 0550 ZT, morning stars were observed, and the vessel's position was determined to be LAT 25°16.0'N, LONG 123°18.0'W. Your vessel is steaming at 22.0 knots on a course of 295°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 02s, and the sextant altitude is 24°00.7'. The index error is 2.6' off the arc, and the chronometer error is 01m 34s slow. Your height of eye on the bridge is 55.0 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    N a. 127.8°T
    N b. 129.8°T
    Y c. 131.9°T
    N d. 133.6°T
2668: Your vessel is on a course of 255°T, at 14 knots. At 2116 a lighthouse is sighted dead ahead at a distance of 11 miles. You change course at this time to pass the lighthouse 3 miles abeam to port. What will be your ETA at this position off the lighthouse? 

    N a. 2149
    Y b. 2201
    N c. 2212
    N d. 2228
2677: You sight a light 9° on your starboard bow at a distance of 21 miles. Assuming you make good your course, what will be your distance off the light when abeam? 

    Y a. 3.3 miles
    N b. 3.7 miles
    N c. 4.0 miles
    N d. 4.3 miles
2785: At 1650 you decrease speed to make good 7.1 mph. At 2020 you are __________. 

    Y a. abeam of Old River Control Structure Light
    N b. entering the Vicksburg District of the U.S. Army Corps. of Engineers
    N c. at Palmetto Point
    N d. at Latitude 31°10'N
2888: Your vessel is underway on a course of 323.5°T at a speed of 16 knots. At 1945° a light bears 350°T. At 2010 the light bears 008.5°T. What will be your distance off when abeam of the light? 

    N a. 3.3 miles
    N b. 4.8 miles
    Y c. 6.7 miles
    N d. 8.7 miles
3057: The propeller on a vessel has a diameter of 25.3 feet and a pitch of 23.2 feet. What would be the apparent slip if the vessel cruised 515 miles in a 23 hour day (observed distance) at an average RPM of 93? 

    N a. -3.6%
    N b. +3.6%
    Y c. -5.2%
    N d. +5.2%
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%
3278: While steaming at 14 knots, your vessel burns 276 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 11.7 knots? 

    N a. 135 bbls/day
    Y b. 161 bbls/day
    N c. 196 bbls/day
    N d. 245 bbls/day
10500: At 1712 your GPS indicates a position of LAT 36°54.8'N, LONG 75°39.8'W. You are on course 319° per standard magnetic compass at a speed of 9.9 knots. At 1800 your GPS indicates your position at LAT 37°00.0'N, LONG 75°45.8'W. What were the set and drift? 

    N a. 262°T at 0.9 knot
    N b. 267°T at 1.3 knots
    Y c. 087°T at 1.2 knots
    N d. 093°T at 0.8 knot
11406: At 2021 your position is LAT 41°09.7'N, LONG 72°59.8'W. At 2057 your position is LAT 41°00.5'N, LONG 72°49.5'W. What are your true course and speed made good? 

    Y a. 140° at 20 knots
    N b. 145° at 18 knots
    N c. 316° at 19 knots
    N d. 320° at 17 knots
12209: You sight South West Ledge Light in line with New Haven Outer Channel Range Rear Light bearing 338.5° per standard magnetic compass. What is the deviation? 

    Y a. 3°E
    N b. 4°W
    N c. 6°E
    N d. 9°W
12701: You are on course 298° per standard magnetic compass when you take the following bearings: Block Island Southeast Point Light - 058°psc Block Island Aero Beacon - 005°psc Montauk Point Light - 268°psc What is your position? 

    N a. LAT 41°08.3'N, LONG 71°35.0'W
    Y b. LAT 41°08.2'N, LONG 71°34.4'W
    N c. LAT 41°08.1'N, LONG 71°33.8'W
    N d. LAT 41°08.0'N, LONG 71°34.1'W
13402: You are planning to anchor in Orient Harbor at LAT 41°07.9'N, LONG 72°18.5'W. What type of bottom should you expect? 

    N a. Sticky
    Y b. Soft
    N c. Stiff
    N d. Streaky
13701: Why are there no buoys charted at the approach to Sand Shoal Inlet (LAT 37°16'N, LONG 75°46'W)? 

    N a. No buoys are stationed there.
    N b. They frequently shift position due to heavy weather.
    Y c. They are frequently shifted to conform to the changing channel.
    N d. The buoys are being replaced with fixed lights.
14502: You are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville reservoir stands at 84 feet above MSL. If the highest point on your vessel is 49 feet above the water, what will be the vertical clearance as you pass under the center of the Bridge of the Gods? 

    Y a. 74.0 feet
    N b. 86.0 feet
    N c. 97.5 feet
    N d. 123 feet
15063: At 0830, you want the latest weather forecasts for the Falkner Island area. On what frequency do you set your FM radio for this information? 

    N a. 2182 kHz
    N b. 162.80 Mhz
    N c. 156.65 Mhz
    Y d. 162.55 Mhz
15406: At 1400, your position is LAT 37°14.7'N, LONG 76°22.3'W. From this position, you head for the York River Entrance Channel Buoy "17". What should you steer per standard magnetic compass for this heading? 

    N a. 108°psc
    N b. 119°psc
    N c. 122°psc
    Y d. 125°psc
15842: From your 2030 fix you change course to 195°T, and leave the engine speed at 14 knots.
At 2045, Your position is L 37° 13.50'N Long 075° 38.05' W


Which statement is TRUE? 

    Y a. Cape Charles Light bears 050° relative.
    N b. Chesapeake Light bears 190° relative.
    N c. Your fathometer reading is approximately 40 fathoms.
    N d. Your vessel is located in a restricted area.
15918: At 1038, you are 0.4 mile south of Long Sand Shoal Buoy "8A" on course 090°T when visibility is reduced to 1 mile in rain and haze. You intend to stay on 090°T until your Loran shows a reading that you can safely follow to the approaches of New London. Which of the following Loran readings will you look for? 

    N a. 9960-W-14720
    N b. 9960-X-26290
    Y c. 9960-Y-43980
    N d. 9960-W-14810
15938: At 1910 you obtain the following bearings:

Bartlett Reef Light 268°T
Race Rock Light 147°T
Little Gull Island Light 198°T

Which of the following is your position at 1910? 

    N a. LAT 41°17.4'N, LONG 72°05.6'W
    N b. LAT 41°17.0'N, LONG 72°07.1'W
    Y c. LAT 41°16.6'N, LONG 72°04.6'W
    N d. LAT 41°16.2'N, LONG 72°06.4'W
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
16261: At 0400 you take the following bearings:

Sand Shoal Inlet South Light bearing 299°pgc
Cape Charles Light bearing 242°pgc

What is your 0400 position? 

    N a. LAT 37°14.2'N, LONG 75°39.2'W
    Y b. LAT 37°14.4'N, LONG 75°39.3'W
    N c. LAT 37°14.4'N, LONG 75°39.0'W
    N d. LAT 37°14.6'N, LONG 75°39.2'W
16268: 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 gyro bearing is 048°. What is the gyro error by observation? 

    N a. 4°E
    Y b. 1°E
    N c. 0°
    N d. 2°W
16444: At 1042 you take the following round of bearings:

Cape Henry Light 259°T
Chesapeake Light 101°T
Cape Charles Light 006°T
From this position, you set course 070°T at a speed of 9.5 knots.

What is the course per standard magnetic compass? 

    N a. 069.5°psc
    N b. 060.5°psc
    Y c. 079.5°psc
    N d. 080.5°psc
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
16706: At 0520, you take the following observations:

Point Judith Light 032°pgc
Point Judith Harbor of Refuge
Main Breakwater Center Light 308°pgc

What is the position of your 0520 fix? 

    N a. LAT 41°20.8'N, Long 71°30.3'W
    Y b. LAT 41°20.8'N, Long 71°29.7'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
16713: At 0600 you take the following bearings:

Point Judith Light bearing 063°pgc
Block Island North Reef Light bearing 144°pgc

What is your 0600 position? 

    N a. LAT 41°18.1'N, LONG 71°38.3'W
    Y b. LAT 41°18.3'N, LONG 71°38.7'W
    N c. LAT 41°18.4'N, LONG 72°38.1'W
    N d. LAT 41°18.5'N, LONG 71°38.9'W