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.


45: You are in charge of a vessel that damages an aid to navigation established and maintained by the United States. Which statement is TRUE?


49: As you pass under the Greenville Highway Bridge, you estimate the current as 4.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph?


147: After passing Oak Bend Lt. (mile 425.6 AHP) you see a light gray shaded area extending into the river shown on the map. This indicates a __________.


205: From your 1830 fix, you come left to a course of 290°T. Which of the following statements concerning Watch Hill Light is FALSE?

    N a. The nominal range of its white light is 15 miles.
    N b. It displays both red and white lights.
    Y c. Its geographic range is 18.5 miles at a 35 foot (10.7 meter) height of eye.
    N d. Its horn blasts every 30 seconds in fog.

443: 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. 193°
    Y b. 190°
    N c. 187°
    N d. 185°

522: In clear weather, how far away will you sight Point Judith Light? (use charted range of 20 miles as nominal range)

    Y a. 14.0 nm
    N b. 12.3 nm
    N c. 10.6 nm
    N d. 9.2 nm

634: You have orders to drop off the empties at the fleeting area at Cairo Point and add five loaded tank barges to your tow. If you are turning for 9 mph and estimate the current at 1.5 mph, what is your ETA at Cairo?

    N a. 1031, 22 June
    Y b. 1423, 22 June
    N c. 1741, 22 June
    N d. 2210, 22 June

640: Which of the following statements concerning the buoys on the Mississippi River is TRUE?

    N a. The position of river buoys can be determined by consulting the latest Light List - Vol. V.
    N b. A preferred channel mark is a lateral mark indicating a channel junction which must always be passed to starboard.
    Y c. Setting a buoy is the act of placing a buoy on assigned position in the water.
    N d. None of the above.

997: On 20 November , your 0612 zone time (ZT) position was LAT 25°38.0'N, LONG 166°54.0'W. Your vessel was steaming on course 126°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0854 ZT. The chronometer read 07h 51m 14s and was slow 02m 52s. The observed altitude (Ho) was 27°58.3'. LAN occurred at 1147 ZT. The observed altitude (Ho) was 45°35.0'. What was the longitude of your 1147 ZT running fix?

    N a. 165°20.2'W
    N b. 165°18.4'W
    N c. 165°15.8'W
    Y d. 165°12.5'W

1130: At 1923, on September 21, you pass Bixby Towhead Light (mile 873.7 AHP). What was your average speed since leaving Cairo?

    N a. 9.2 mph
    N b. 8.8 mph
    Y c. 8.5 mph
    N d. 7.2 mph

1133: 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

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

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

1538: At 1032 on 24 June, you pass Carolina Landing Light(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

1731: What is the total length of the trip?

    N a. 910.6 miles
    Y b. 901.2 miles
    N c. 900.3 miles
    N d. 873.7 miles

1737: At 1227, on 19 October, 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 1045 the following day?

    N a. 5.2 mph
    N b. 5.6 mph
    Y c. 5.9 mph
    N d. 6.3 mph

1806: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?

    N a. U.S.C.G. Light List
    Y b. U.S.C.G. Local Notice to Mariners
    N c. Army Corps. of Engineers Navigation Chart
    N d. List of Buoys and Daymarks

1915: On 14 January , your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 043°T at an observed altitude (Ho) of 37°12.1'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

    N a. Gienah
    N b. Kochab
    N c. Gacrux
    Y d. Eltanin

1953: You are downbound when you observe on your Mississippi River map a circel with black and white quadrants on the left bank. This indicates a __________.

    Y a. river gage
    N b. daymark
    N c. control tower
    N d. information board

2336: You have steamed 916 miles at 13 knots, and consumed 166 tons of fuel. If you have to steam 1325 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 14 knots?

    N a. 133 tons
    N b. 181 tons
    N c. 207 tons
    Y d. 278 tons

2336: You have steamed 916 miles at 13 knots, and consumed 166 tons of fuel. If you have to steam 1325 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 14 knots?

    N a. 133 tons
    N b. 181 tons
    N c. 207 tons
    Y d. 278 tons

2589: From the 2130 position, you steer 236°T at 10 knots. A strong northerly wind is causing 4° of leeway. What course must you steer per standard compass, to make good 236°T?

    N a. 232° psc
    N b. 240° psc
    N c. 244° psc
    Y d. 252° psc

2869: Your vessel is on a course of 237°T at 18 knots. At 0404 a light bears 263.5°T, and at 0430 the light bears 282°T. At what time and at what distance off will your vessel be when abeam of the light?

    N a. 0448, 6.8 miles
    N b. 0452, 7.2 miles
    Y c. 0456, 7.8 miles
    N d. 0500, 8.4 miles

3088: If the pitch of the propeller is 21.5 feet, and the revolutions per day are 96,666, calculate the day's run allowing 9% negative slip.

    N a. 311.1 miles
    N b. 341.8 miles
    N c. 357.9 miles
    Y d. 372.6 miles

3098: If the pitch of the propeller is 21.2 feet, and the revolutions per day are 93,660, calculate the day's run allowing 5% positive slip.

    N a. 163.3 miles
    N b. 217.8 miles
    Y c. 310.3 miles
    N d. 342.9 miles

3260: You have steamed 726 miles at 17.5 knots, and consumed 138 tons of fuel. If you have 252 tons of usable fuel remaining, how far can you steam at 13.5 knots?

    N a. 789 miles
    N b. 1326 miles
    N c. 1719 miles
    Y d. 2228 miles

3455: You wish to make good a course of 230°T while turning for an engine speed of 12.5 knots. The set is 180°T, and the drift is 1.7 knots. What course should you steer?

    N a. 244°T
    Y b. 236°T
    N c. 231°T
    N d. 222°T

3768: While entering a harbor on a course of 225° per gyrocompass, you take a bearing on a pair of range lights and get 220° per gyrocompass. The bearing on the chart is 217°T. The variation for the area is 6°W, and deviation is 2°W. What course would you steer per gyrocompass to make good a true course of 232°?

    N a. 229°pgc
    N b. 231°pgc
    N c. 233°pgc
    Y d. 235°pgc

6446: You continue on course from your 1126 fix. At 1131 Cape Charles Light bears 322°T. At 1135 you change course to 000°T. At 1149 Cape Henry Light bears 247°T. Which statement concerning your 1149 running fix is TRUE?

    N a. Your fathometer reads 47 feet.
    Y b. You are in a danger area.
    N c. Chesapeake Light is due south of you.
    N d. You are north of Smith Island Shoal.

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

12709: You are on course 157° per standard magnetic compass when you take the following bearings: Little Gull Island Light 276°psc Race Rock Light 301°psc Latimer Reef Light 028°psc What is your position?

    N a. LAT 41°13.5'N, LONG 71°57.9'W
    Y b. LAT 41°13.5'N, LONG 71°57.4'W
    N c. LAT 41°13.6'N, LONG 71°57.0'W
    N d. LAT 41°13.6'N, LONG 71°57.8'W

13106: At 1048 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at the west gap of Point Judith Harbor of Refuge if you make good 11.3 knots?

    Y a. 1144
    N b. 1154
    N c. 1159
    N d. 1205

14403: You are underway and steaming in an easterly direction on the Columbia River. After bringing Fisher Quarry Channel Range in line over your bow, you move to the left outside quarter of the channel. What should your fathometer read at this position, if the staff gauge at Portland reads +12.5 feet?

    N a. 7.5 feet
    Y b. 32.5 feet
    N c. 41.5 feet
    N d. 51.5 feet

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

15010: At 1950, your position is LAT 37°12.3'N, LONG 75°38.6'W. The set and drift from 1930 to 1950 were __________.

    N a. 150°T at 0.6 knot
    Y b. 150°T at 1.6 knots
    N c. 330°T at 0.6 knot
    N d. 330°T at 1.6 knots

15230: What is the distance from Cairo Point, IL, to Arkansas City?

    N a. 28 miles
    N b. 110 miles
    N c. 292 miles
    Y d. 400 miles

15268: Your vessel is proceeding up New London Harbor Channel, and you are in line with the range. What would be your course per standard magnetic compass?

    N a. 352°
    N b. 354°
    N c. 002°
    Y d. 007°

15507: What course should you steer by your standard magnetic compass to make good a course of 280°T?

    N a. 266°psc
    N b. 272°psc
    N c. 290°psc
    Y d. 294°psc

15507: What course should you steer by your standard magnetic compass to make good a course of 280°T?

    N a. 266°psc
    N b. 272°psc
    N c. 290°psc
    Y d. 294°psc

15613: Which statement concerning your 1920 position is TRUE?

    Y a. You are entering a restricted area.
    N b. You are governed by the Inland Rules of the Road.
    N c. You are within the Chesapeake Bay Entrance traffic separation scheme.
    N d. You can expect differences of as much as 6° from the normal magnetic variation of the area.

15614: From your 1920 position, you change course to enter Chesapeake Channel between buoys 9 and 10. What is the course per standard magnetic compass (psc) ?

    N a. 286°psc
    Y b. 283°psc
    N c. 280°psc
    N d. 274°psc

15668: At 0839, Montauk Pt. Light is bearing 205°T at a radar distance of 6.6 miles. What is your speed made good from your 0815 position?

    N a. 8.2 knots
    Y b. 9.2 knots
    N c. 10.0 knots
    N d. 10.5 knots

15725: At 1723 you increase speed to make good 9.2 mph. At 1937 you have a daymark on your port beam. What daymark is this?

    N a. Tiptonville Ferry Landing Daymark
    N b. Tiptonville Light
    Y c. Merriwether Bend Light and Daymark
    N d. Alaska Light and Daymark

15939: From your 1910 position, you set a course of 162°T at a speed of 14 knots. What will serve as a definite warning that you are being set towards Race Rock Light?

    N a. Decreasing bearings to Race Rock Light
    Y b. Decreasing loran readings on loran rate 9960-W
    N c. Increasing soundings
    N d. Decreasing radar ranges to Race Point

15945: At 2107 Southeast Point Light bears 062°T, and at 2112 this light bears 038°T. What is your distance off Southeast Point Light at 2112? (assume no set and drift)

    N a. 2.1 miles
    Y b. 2.5 miles
    N c. 2.9 miles
    N d. 3.3 miles

16057: What is the maximum allowable speed of vessels underway up river from Tue Marshes Light?

    N a. 8 knots
    N b. 10 knots
    Y c. 12 knots
    N d. 14 knots

16457: The coast between Great Machipongo Inlet and Cape Charles is __________.

    N a. broken by the mouths of several major rivers
    Y b. low, with sandy beaches bordered by marsh and woodlands
    N c. marked by prominent, isolated, barren hills
    N d. composed of high, rocky bluffs and wooded uplands

16457: The coast between Great Machipongo Inlet and Cape Charles is __________.

    N a. broken by the mouths of several major rivers
    Y b. low, with sandy beaches bordered by marsh and woodlands
    N c. marked by prominent, isolated, barren hills
    N d. composed of high, rocky bluffs and wooded uplands

16545: At 0030 you alter course and speed to make good 265°T at 10 knots. What is your ETA at a point where Stratford Shoal Middle Ground Light is abeam?

    N a. 0218
    N b. 0223
    N c. 0228
    Y d. 0233

16617: At 0200, you take the following bearings:

Falkner Island Light 004.5°T
Kelsey Pt. Breakwater Lt. 054.0°T
Horton Point Light 115.0°T

What were the set and drift from 0130?

    N a. 260° at 0.5 knot
    N b. 080° at 1.0 knot
    Y c. 260° at 1.0 knot
    N d. There is no current.

16620: You sight Bartlett Reef Light in line with New London Harbor Light bearing 043°pgc. You are heading 088°pgc and 098.5° per standard magnetic compass at the time of the observation. Which statement is TRUE?

    N a. The true heading at the observation was 090°.
    Y b. The deviation is 1.5°E by observation.
    N c. The magnetic compass error is 9.5°W.
    N d. The gyro error is 2°E.

16642: Based on your 0500 fix, which statement is TRUE?

    N a. You are seaward of the 120 fathom curve.
    N b. The course made good between 0445 and 0500 was 345°T.
    Y c. You should alter course to port to clear Southwest Ledge Shoal.
    N d. A radar contact bearing 020°T at 4.8 miles is buoy "2A".

16717: At 0705, you take the following bearings:
Watch Hill Light 030.5°pgc
Latimer Reef Light 329.0°pgc
Race Rock Light 262.0°pgc

What was the true course made good between 0645 and 0705?

    N a. 252°T
    Y b. 256°T
    N c. 263°T
    N d. 266°T