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.

40: Which of the following statements regarding aids to navigation shown in the Army Corps. of Engineers map book is TRUE?
121: As you approach Casting Yard Dock Lt. (mile 265.4 AHP) you notice on the map a circle with 2 black sectors. This symbol indicates a __________.
372: If you change course at 0610, what is the course to steer to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")?
398: You depart LAT 32°16.6'N, LONG 68°28.0'W. What is the course and distance as calculated by Mercator sailing to a position at LAT 43°12.2'N, LONG 55°39.0'W? 

    Y a. 042.8°T, 896.2 miles
    N b. 049.1°T, 955.1 miles
    N c. 132.8°T, 896.2 miles
    N d. 136.6°T, 955.1 miles
409: A vessel steams 1082 miles on course 047°T from LAT 37°18.0'N, LONG 24°40.0'W. What is the latitude and longitude of the point of arrival by Mercator sailing? 

    N a. LAT 49°30.0'N, LONG 06°22.0'W
    N b. LAT 49°33.0'N, LONG 06°25.0'W
    Y c. LAT 49°36.0'N, LONG 06°28.0'W
    N d. LAT 49°39.0'N, LONG 06°31.0'W
472: The great circle distance from LAT 38°17.0'N, LONG 123°16.0'W to LAT 35°01.0'N, LONG 142°21.0'E is 4330 miles and the initial course is 300.9°T. The latitude of the vertex is 47°40.5'N. What is the longitude of the vertex? 

    N a. 173°04.6'E
    N b. 167°18.0'E
    N c. 173°04.6'W
    Y d. 167°18.5'W
506: At 0112, what is the approximate depth under the keel? 

    N a. 57 feet (17.3 meters)
    N b. 51 feet (15.5 meters)
    N c. 47 feet (14.2 meters)
    Y d. 38 feet (11.5 meters)
512: 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? 

    Y a. 260° at 1.0 knot
    N b. 080° at 0.5 knot
    N c. 260° at 0.5 knot
    N d. There is no current.
573: Visibility has decreased to 1 mile in haze. At 0948, you take the following radar ranges. What course should you steer from this fix to the York Spit channel between buoys "19" and "20"?

Thimble Shoal Light - 5.9 miles South end of trestle C of the Chesapeake Bay Bridge and Tunnel - 3.8 miles South end of trestle B of the Chesapeake Bay Bridge and Tunnel - 5.4 miles 

    Y a. 010°pgc
    N b. 008°pgc
    N c. 004°pgc
    N d. 001°pgc
1091: On 10 August , your 0430 ZT position is LAT 29°56.7'S, LONG 139°11.0'E. Your course is 321°T, speed 18.2 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0500 running fix. NP-0021

    N a. LAT 29°46.0'S, LONG 138°54.0'E
    Y b. LAT 29°49.2'S, LONG 138°57.0'E
    N c. LAT 29°56.0'S, LONG 139°03.8'E
    N d. LAT 30°07.5'S, LONG 138°55.2'E
1103: On 25 August , your 0300 zone time DR position is LAT 21°28.0'N, LONG 167°48.0'E. You are on course 248°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0032

    N a. LAT 20°52.4'N, LONG 167°32.1'E
    Y b. LAT 20°57.1'N, LONG 167°01.0'E
    N c. LAT 20°59.5'N, LONG 166°54.8'E
    N d. LAT 21°06.0'N, LONG 167°10.9'E
1251: On 16 August , your 1600 ZT DR position is LAT 26°17.0'N, LONG 165°17.0'E. You are on course 301°T at a speed of 15 knots. What will be the zone time of sunset at your vessel? 

    N a. 1827
    N b. 1832
    Y c. 1838
    N d. 1845
1298: 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.? 

    Y a. 1242, April 19th
    N b. 1645, April 19th
    N c. 2242, April 19th
    N d. 2333, April 19th
1365: You estimate the current as 2.5 mph. What is the speed over the ground? 

    N a. 11.0 mph
    N b. 8.0 mph
    Y c. 6.0 mph
    N d. 5.5 mph
1453: On 15 October , your 0325 zone time DR position is LAT 26°51.0'N, LONG 138°17.0'W. At that time, you observe Canopus bearing 167°pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2°E. What is the gyro error? 

    Y a. 1.3°W
    N b. 3.2°W
    N c. 3.2°E
    N d. 4.1°W
1666: On 23 October , your vessel's 1722 zone time DR position is LAT 27°36'S, LONG 96°16'W, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 246° per standard compass. Variation in the area is 14.0°E. The chronometer reads 11h 24m 19s and is 01m 43s fast. What is the deviation of the standard compass? 

    N a. 2.3°E
    N b. 2.7°E
    N c. 2.7°W
    Y d. 3.1°W
1702: You are upbound approaching Springfield Bend Lt. (mile 244.8 AHP) downriver from Profit Island. Which of the following statements is TRUE? 

    Y a. Profit Island Chute is closed to navigation.
    N b. Tow length must not exceed 600 feet to use Profit Island Chute.
    N c. Tows must navigate toward left ascending bank when passing Profit Island Chute.
    N d. Profit Island Chute is open to navigation and is a shortcut for single barge tows.
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
1771: You are turning for 7.8 mph and estimate the current at 1.0 mph. What is your speed over the ground? 

    N a. 6.8 mph
    N b. 7.8 mph
    Y c. 8.8 mph
    N d. 9.8 mph
1839: What are the dimensions of the channel maintained from Baton Rouge to New Orleans, LA? 

    N a. 30 feet x 300 feet
    N b. 40 feet x 300 feet
    N c. 30 feet x 500 feet
    Y d. 45 feet x 500 feet
1957: 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
1958: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)? 

    Y a. Green square
    N b. Green triangle
    N c. Green diamond
    N d. Red square
2123: At 0410, you take the following bearings:
New Point Comfort Light "2" 244°pgc Wolf Trap Light 315°pgc What is your 0410 position? 

    N a. LAT 37°21.2'N, LONG 76°08.3'W
    N b. LAT 37°21.1'N, LONG 76°08.8'W
    N c. LAT 37°21.1'N, LONG 76°07.9'W
    Y d. LAT 37°21.0'N, LONG 76°08.1'W
2704: You are underway on course 340°T at a speed of 14.8 knots.
You sight a buoy bearing 342°T at a radar range of 4.8 miles at 1422. If you change course at 1428, what is the true course to steer to leave the buoy abeam to port at 1.0 mile? 

    N a. 327°T
    N b. 354°T
    N c. 357°T
    Y d. 001°T
2780: 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
2897: You are steaming on a course of 327°T at 13 knots. At 0207 you observe a lighthouse bearing 020°T. At 0226 the lighthouse bears 042°T. What is your distance off at the second bearing? 

    N a. 8.5 miles
    Y b. 8.9 miles
    N c. 9.2 miles
    N d. 9.7 miles
3086: If the pitch of the propeller is 19.7 feet, and the revolutions per day are 86,178, calculate the day's run allowing 3% negative slip. 

    N a. 279.2 miles
    Y b. 287.6 miles
    N c. 311.4 miles
    N d. 326.2 miles
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
3312: You have steamed 199 miles and consumed 23.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 410 miles? 

    N a. 32.6 tons
    N b. 39.9 tons
    Y c. 47.4 tons
    N d. 97.6 tons
10108: What is the base course per standard magnetic compass while southbound in the middle leg of York Spit Channel? 

    N a. 161.0°psc
    N b. 165.5°psc
    N c. 180.0°psc
    Y d. 184.0°psc
11007: What will be the height of the high water at Mount Sinai Harbor on the morning of 26 August 1983? 

    N a. 4.1 feet
    Y b. 6.3 feet
    N c. 7.2 feet
    N d. 8.4 feet
11306: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 1950 your position is LAT 36°59.5'N, LONG 75°37.0'W. What is the speed made good? 

    N a. 5.6 knots
    N b. 8.2 knots
    N c. 9.1 knots
    Y d. 10.9 knots
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
11901: You are turning for 7.5 knots and a westerly wind is causing 2° of leeway. There is a current of 047°T at 1.2 knots. What course should you steer between the entrance to Quonochontaug Pond (LAT 41°19.8'N, LONG 71°43.2'W) and the entrance to Great Salt Pond (LAT 41°12.0'N,
LONG 71°35.6'W)? 

    N a. 156°T
    Y b. 155°T
    N c. 144°T
    N d. 140°T
12609: You are on course 239° per standard magnetic compass when you take the following bearings: Falkner Island Light 314°psc Duck Island West Breakwater Light 2DI 039°psc Horton Point Light 157°psc What is your position? 

    Y a. LAT 41°09.9'N, LONG 72°32.0'W
    N b. LAT 41°09.3'N, LONG 72°33.0'W
    N c. LAT 41°10.5'N, LONG 72°32.1'W
    N d. LAT 41°11.6'N, LONG 72°33.6'W
12706: You are on course 053° per standard magnetic compass when you take the following bearings: Little Gull Island Light 275°psc Race Rock Light 296°psc Latimer Reef Light 011°psc What is your position? 

    N a. LAT 41°12.9'N, LONG 71°56.3'W
    Y b. LAT 41°13.2'N, LONG 71°56.0'W
    N c. LAT 41°13.4'N, LONG 71°55.5'W
    N d. LAT 41°13.8'N, LONG 71°56.1'W
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
14203: What is the vertical clearance of the fixed bridge across the entrance to Rock Creek at Stevenson, Washington? 

    Y a. 18 feet
    N b. 36 feet
    N c. 54 feet
    N d. 70 feet
14404: You are underway and proceeding in an easterly direction on the Columbia River. You position your vessel in the middle of the channel and bring Government Island Lower Range in line over your bow. What should your fathometer read at this position, if the staff gauge at Portland reads 10.0 feet? 

    Y a. 15 feet
    N b. 24 feet
    N c. 28 feet
    N d. 31 feet
15212: 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? 

    N a. 127° at 1.1 knot
    Y b. 127° at 0.5 knot
    N c. 307° at 1.1 knot
    N d. 307° at 0.5 knot
15260: From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 4°
leeway. What course should you steer per standard magnetic compass in order to make good your true course? 

    N a. 101°psc
    N b. 108°psc
    N c. 110°psc
    Y d. 115°psc
15307: At 0315, you obtain the following bearings:

Old Plantation Flats Light bearing 179.5° true
Wolf Trap Light bearing 271° true

What is the true course from this position to the entrance of York Spit Channel? 

    N a. 203°
    Y b. 208°
    N c. 211°
    N d. 217°
15309: The engineer has advised that it will be necessary to secure the gyrocompass and the electronic equipment. From your 0315 position, what is your course per standard magnetic compass to York Spit Channel Buoy "38", if there is no current? 

    N a. 212°psc
    N b. 214°psc
    Y c. 216°psc
    N d. 218°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.
15465: 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.
    Y b. The line marks the limits of a regulated area.
    N c. The line indicates a submarine cable, and you should not anchor in the area.
    N d. It marks the range between Hampton Roads and Cherrystone Channel.
15627: What is the vertical clearance of the Natchez Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.1 ft)? 

    N a. 102.2 ft
    N b. 108.3 ft
    Y c. 119.4 ft
    N d. 125.6 ft
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
15757: If you change course at 0610, what is the course to steer per gyro compass to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")? 

    N a. 072°pgc
    Y b. 076°pgc
    N c. 080°pgc
    N d. 084°pgc
15909: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. What loran reading will ensure that you will remain clear of the 18' shoal located 1 mile NW of Falkner Island Light? 

    N a. 9960 W: not less than 14942
    N b. 9960 X: not more than 26452
    Y c. 9960 Y: not less than 44013
    N d. None of the above
16011: At 0415, you take the following bearings:

Stratford Point Light 329.5°pgc
Middle Ground Light 223.5°pgc
Old Field Point Light 199.5°pgc

Which statement is TRUE? 

    Y a. You are to the right of your intended track line.
    N b. The current's drift is greater than predicted.
    N c. The course made good since 0352 is 081°T.
    N d. Your fathometer reads about 76 fathoms.
16066: Which statement concerning Thimble Shoal Channel is TRUE? 

    Y a. The project width of the main channel is 1000 feet (30.3 meters)
    N b. The channel is 14.5 miles in length.
    N c. A tow drawing 30 feet (9.1 meters) is excluded from the main channel.
    N d. Thimble Shoal Channel is in international waters.
16115: You sighted Trestle "A" in line at 0707 and are steering 108°T. At 0731, Cape Henry Light bears 136°T; Cape Charles Light bears 032.5°T; and Thimble Shoal Tunnel South Light bears 282°T. What was the speed made good between 0707 and 0731? 

    N a. 8.3 knots
    Y b. 8.8 knots
    N c. 9.2 knots
    N d. 9.4 knots
16215: The wind is southerly, and you estimate 3° leeway. Allowing for leeway, what is the course to steer from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"? 

    N a. 079°pgc
    N b. 081°pgc
    N c. 085°pgc
    Y d. 087°pgc
16265: At 0600, you are on course 241°psc at 6.5 knots. Chesapeake Light bears 153° per standard magnetic compass,
and Cape Henry Light bears 261° per standard magnetic compass. What is the position of your 0600 fix? 

    N a. LAT 36°59.0'N, LONG 75°47.4'W
    Y b. LAT 36°59.3'N, LONG 75°47.7'W
    N c. LAT 36°59.5'N, LONG 75°47.8'
    N d. LAT 36°59.3'N, LONG 75°48.0'