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.

80: The Helena Gage reads 9.4 feet. The high point on your towboat is 46 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
216: NOAA VHF-FM weather broadcasts from New London, CT are on __________.
283: At 1810, you sight a buoy on your starboard side labeled "19". This buoy marks __________.
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
352: What is the approximate distance to New Bedford, MA, from your 0530 DR position, if your 0352 position was 7 miles from Bridgeport, CT? 

    N a. 122 miles
    N b. 115 miles
    Y c. 104 miles
    N d. 95 miles
459: Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W. 

    N a. 3341.0 miles, 063°T
    N b. 3347.0 miles, 063°T
    N c. 3427.8 miles, 061°T
    Y d. 3588.6 miles, 059°T
460: Determine the great circle distance and initial course from LAT 35°27.0'N, LONG 140°20.5'E to LAT 47°51.0'N, LONG 122°51.0'W. 

    N a. 4087 miles, 036°T
    Y b. 4115 miles, 045°T
    N c. 4122 miles. 076°T
    N d. 4136 miles, 076°T
537: Determine the distance from LAT 19°54.0'N, LONG 166°36.0'E to LAT 19°54.0'N, LONG 157°54.0'W. by parallel sailing. 

    N a. 2204.6 miles
    N b. 2006.9 miles
    Y c. 2002.8 miles
    N d. 1990.6 miles
566: Your cargo vessel is berthed near Lamberts Point in Norfolk. You are on a voyage to Baltimore, Maryland. Which larger scale chart should you use to show the area from Lamberts Point to Hampton Roads? 

    N a. 12224
    N b. 12241
    Y c. 12245
    N d. 12256
636: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light? 

    N a. Green triangle
    N b. Red and green banded square
    N c. Green square daymark
    Y d. Diamond-shaped green daymark
705: At 1554, on 25 May, you pass Huntington Point Light (mile 555.2 AHP). What was your average speed since departing Amoco Pipeline Co. DockS (mile 253.6 AHP)? 

    Y a. 6.2 mph
    N b. 5.2 mph
    N c. 4.8 mph
    N d. 4.3 mph
751: On 16 July , at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant reads 26°57.5'. Your chronometer reads 05h 59m 16s, and your chronometer error is 01m 28s slow. Your height of eye is 48 feet, and the index error for your sextant is 1.3' off the arc. What is the latitude of your vessel from your observation of Polaris? 

    N a. 26°52.1'N
    N b. 26°58.8'N
    Y c. 27°36.1'N
    N d. 27°43.4'N
812: On 28 July , your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT? 

    N a. 26°25.0'N
    Y b. 26°27.6'N
    N c. 26°29.8'N
    N d. 26°32.0'N
819: On 27 March , in DR position LAT 32°31.0'N, LONG 76°25.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 05h 23m 32s, and the chronometer error is 01m 30s fast. The sextant altitude (hs) is 59°59.0'. The index error is 1.8' off the arc, and your height of eye is 52 feet. What is the latitude at meridian transit? 

    N a. LAT 32°21.6'N
    Y b. LAT 32°29.5'N
    N c. LAT 32°37.6'N
    N d. LAT 32°46.2'N
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
1148: You complete changing out your tow and get underway enroute Ark City Tank Storage (mile 554.0 AHP) to deliver the tank barges. What is the distance you must travel from Cairo Point Light? 

    N a. 202.1 miles
    Y b. 400.7 miles
    N c. 554.2 miles
    N d. 605.8 miles
1273: At 1544 zone time, on 5 October , your DR position is LAT 25°00'N, LONG 60°15'W. You are steering 270°T at a speed of 6.8 knots. What is the zone time of sunset? 

    N a. 1728
    N b. 1737
    N c. 1741
    Y d. 1745
1423: You pass Ratcliff Light (mile 289.8) at 1650. What was your average speed since leaving Baton Rouge? 

    N a. 7.3 mph
    Y b. 7.6 mph
    N c. 8.0 mph
    N d. 8.3 mph
1734: You pass Springfield Bend Lt. (mile 244.8 AHP) at 1242, on 17 October, and estimate the current will average 2.5 mph for the remainder of your trip. What is your ETA at the mouth of the Ohio River if you are making turns for 10.5 mph? 

    N a. 1905, 19 October
    N b. 0207, 21 October
    Y c. 0519, 21 October
    N d. 0847, 21 October
1770: What are the light characteriditcs of the Bunge Corporation Terminal Lights (2) at mile 570.6 AHP? 

    N a. a group flashing white light every five seconds
    N b. a flashing green light every 4 seconds
    Y c. a flashing green light every 6 seconds
    N d. a flashing red light every 4 seconds
2011: On 3 February , your 0547 zone time DR position is LAT 24°18.5'N, LONG 167°25.0'E. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time? 

    Y a. Regulus, Deneb, Antares
    N b. Altair, Saturn, Regulus
    N c. Arcturus, Kochab, Venus
    N d. Jupiter, Denebola, Regulus
2024: On 3 December , evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position for this time will be LAT 24°18.5'S, LONG 110°30.6'W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time? 

    N a. Canopus, Hamal, Deneb
    Y b. Alpheratz, Achernar, Nunki
    N c. Antares, Fomalhaut, Mirfak
    N d. Rigel, Canopus, Regulus
2031: After passing Wilkinson Lt. (mile 310.0 AHP) you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________. 

    N a. stay in the deepest water
    N b. slow down due to dredging operations
    N c. keep as close to the right descending bank as safety permits
    Y d. keep as close to the left descending bank as safety permits
2107: At 0045, you obtain the following bearings:

Rocky Point lookout tower 072°T
Horton Point lighthouse 213°T

What were the set and drift between 0005 and 0045? 

    N a. 272°true, 0.9 knot
    N b. 272°true, 1.4 knots
    N c. 092°true, 0.9 knot
    Y d. 092°True, 1.4 knots
2152: On 25 June , at 0612 zone time, morning stars were observed, and the vessel's position was determined to be LAT 28°13.0'S, LONG 49°34.0'E. Your vessel is steaming at 17.0 knots on a course of 066°T. A sextant observation of the Sun's lower limb is made at 1022 zone time. The chronometer reads 07h 19m 17s, and the sextant altitude is 35°26.3'. The index error is 1.5' on the arc, and the chronometer error is 02m 51s slow. Your height of eye on the bridge is 58.0 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    Y a. 021.5°T
    N b. 157.5°T
    N c. 201.5°T
    N d. 338.5°T
2247: At 1845 zone time, on 17 March , while taking stars for an evening fix, you observe an unidentified star bearing 200°T at an observed altitude of 53°45.0'. Your DR position at the time of the sight is LAT 25°10.0'N, LONG 66°48.0'W. The chronometer time of the sight is 10h 47m 49s, and the chronometer error is 1m 54s fast. Your vessel is steaming on a course of 290°T at a speed of 18.0 knots. What star did you observe? 

    N a. Altair
    N b. Mirfak
    N c. Pollux
    Y d. Rigel
2586: At 2100 Branford Reef Light bears 347°psc and Falkner Island Light bears 059°psc. You also get a radar range of 5.3 miles from Branford Reef Light. What are your LORAN readings? 

    N a. 14994.0,  26473.0,  43982.0
    N b. 14994.5,  26482.0,  43982.0
    Y c. 14996.0,  26477.5,  43981.0
    N d. 14997.5,  26479.5,  43981.0
2705: While on a course of 192°T, a light bears 11° on the starboard bow at a distance of 12.7 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard? 

    N a. 167°T
    N b. 173°T
    N c. 185°T
    Y d. 189°T
2884: Your vessel is steering 238°T at 11 knots. At 2304 a light bears 176°T, and at 2323 the same light bears 155°T. What will be your distance off abeam? 

    N a. 7.5 miles
    N b. 8.0 miles
    Y c. 8.5 miles
    N d. 9.0 miles
3250: You are taking a time tick using the 1200 signal from Valparaiso, Chile. You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 12h 00m 18s. When compared to the chronometer, the comparing watch reads 12h 01m 23s, and the chronometer reads 11h 59m 35s. What is the chronometer error? 

    N a. 0m 18s fast
    N b. 1m 05s fast
    N c. 0m 25s slow
    Y d. 1m 30s slow
3630: You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good? 

    N a. 183°psc
    Y b. 189°psc
    N c. 210°psc
    N d. 223°psc
3754: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 014°T, and the variation is 11°E. If the heading of your vessel at the time of the sighting is 009° per standard magnetic compass, what is the correct deviation? 

    N a. 5°E
    N b. 5°W
    N c. 6°E
    Y d. 6°W
10203: Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming there is no set and drift, what course must you steer per standard magnetic compass (psc) to arrive at a position 3 miles due north of Horton Point Light? 

    N a. 077°psc
    N b. 081°psc
    Y c. 085°psc
    N d. 088°psc
12505: You are on course 056°psc, when you take the following bearings:
New Point Comfort Spit Light "2" 260°psc Horn Harbor Entrance Light "HH" 285°psc Wolf Trap Light 336°psc What is the position of the fix? 

    Y a. LAT 37°19.3'N, LONG 76°08.5'W
    N b. LAT 37°19.3'N, LONG 76°08.8'W
    N c. LAT 37°19.2'N, LONG 76°08.2'W
    N d. LAT 37°19.2'N, LONG 76°08.7'W
12611: You are on course 262° per standard magnetic compass when you take the following bearings: Saybrook Breakwater Light - 338.5°psc Little Gull Island Light - 107.5°psc Horton Point Light - 240.0°psc What is your position? 

    N a. LAT 41°11.9'N, LONG 72°16.7'N
    Y b. LAT 41°12.6'N, LONG 72°17.2'W
    N c. LAT 41°13.0'N, LONG 72°17.7'W
    N d. LAT 41°12.1'N, LONG 72°17.3'W
13903: Your position is LAT 41°12.4'N, LONG 71°53.2'W. You are on course 163°T enroute to sea. You can ensure that you will clear Montauk Point if your loran reading is always __________. 

    N a. more than 9960-X-25990
    Y b. less than 9960-W-14665
    N c. more than 9960-Y-43870
    N d. All of the above
14102: Your vessel is awaiting lockage at Bonneville Locks when you notice that the lock is displaying an amber signal light. What type of vessel is allowed to enter the chamber under this signal? 

    N a. Vessels owned or operated by the United States
    N b. Passenger vessels
    Y c. Commercial freight and log-tow vessels
    N d. All vessels
14300: What is the height above the water of Government Island Upper Range, lower light? 

    Y a. 20 feet
    N b. 24 feet
    N c. 38 feet
    N d. 42 feet
15041: At 0741 you are still steering a course of 206° true, with a speed of 18 knots. At this time you observe Cape Charles Lighted Bell Buoy "14" bearing 222° true and Hog Island Lighted Bell Buoy "12" bearing 015° true . What were the set and drift experienced since 0725? 

    Y a. 259°true at 3.2 knots
    N b. 049°true at 2.5 knots
    N c. 240° true at 1.9 knots
    N d. 042°true at 3.3 knots
15066: If you correct for the current in the preceding question (035°T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy "W"? 

    N a. 1016
    Y b. 1021
    N c. 1026
    N d. 1030
15166: At 2037, you change course and wish to make good a course of 016°T. There is no current, but an easterly wind is causing 3° leeway. What course per standard magnetic compass should you steer to make good the course 016°T? 

    N a. 022°psc
    N b. 025°psc
    Y c. 028°psc
    N d. 031°psc
15420: You are entering Norfolk Harbor and have just passed Craney Island. Which chart should you use for your final approach into Norfolk Harbor? 

    N a. 12223
    N b. 12238
    N c. 12248
    Y d. 12253
15865: From your 0200 position, you change course to 272°pgc. How far north of Stratford Shoal Middle Ground Light does this track pass? 

    Y a. 2.1 miles
    N b. 1.6 miles
    N c. 1.3 miles
    N d. 1.0 miles
16311: The broken magenta line which runs parallel to the shore between Roanoke Point and Mattituck Inlet marks a __________. 

    N a. pipeline
    Y b. fish trap area
    N c. demarcation line
    N d. cable area
16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14? 

    Y a. 194°psc
    N b. 190°psc
    N c. 187°psc
    N d. 180°psc
16506: At 0630, you pass Buoy "PI" close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 207°T and Race Rock Light is bearing 072°T. What is your 0654 position? 

    Y a. LAT 41°14.0'N, LONG 72°05.3'W
    N b. LAT 41°14.2'N, LONG 71°54.6'W
    N c. LAT 41°14.4'N, LONG 72°06.8'W
    N d. LAT 41°19.0'N, LONG 72°05.2'W
16506: At 0630, you pass Buoy "PI" close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 207°T and Race Rock Light is bearing 072°T. What is your 0654 position? 

    Y a. LAT 41°14.0'N, LONG 72°05.3'W
    N b. LAT 41°14.2'N, LONG 71°54.6'W
    N c. LAT 41°14.4'N, LONG 72°06.8'W
    N d. LAT 41°19.0'N, LONG 72°05.2'W
16711: At what time will you cross the 60 foot curve if you make good 12 knots? 

    Y a. 0528
    N b. 0534
    N c. 0541
    N d. 0544