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.?
158: Which daymark should you see as you approach French Point Light (mile 915.4 AHP)?
277: What chart should you use after you enter New London Harbor?
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")? 

    N a. 084°pgc
    Y b. 080°pgc
    N c. 076°pgc
    N d. 072°pgc
397: Your vessel departs LAT 32°45'N, LONG 79°50'W, and is bound for LAT 34°21'S, LONG 18°29'E. Determine the distance by Mercator sailing. 

    N a. 5,021 miles
    Y b. 6,884 miles
    N c. 6,954 miles
    N d. 7,002 miles
406: You depart LAT 49°45.0'N, LONG 06°35.0'W, and steam 3599 miles on course 246.5°T. What is the longitude of your arrival by Mercator sailing? 

    N a. LONG 76°36.2'W
    Y b. LONG 77°02.8'W
    N c. LONG 78°14.0'W
    N d. LONG 78°22.6'W
453: Determine the great circle distance and initial course from LAT 08°36.0'N, LONG 126°17.0'E to LAT 02°12.0'S, LONG 81°53.0'W. 

    N a. 9015 miles, 067°T
    N b. 9076 miles, 067°T
    N c. 9105 miles, 079°T
    Y d. 9076 miles, 079°T
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.
595: You are passing the Bayou Sara Gage which reads 3.9 feet. The low water reference plane (LWRP) at Bayou Sara is 5.25 feet. Which of the following statements is TRUE? 

    N a. The river level is above the Low Water Reference Plane.
    N b. Red Store Landing Revetment is ahead on your starboard side
    N c. This gage reading is at a lower elevation than the same reading on the Gage at Head of Passes.
    Y d. None of the above.
628: You are on a voyage from Valdez, AK, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15.0 knots. You estimate a layover in San Francisco, CA, of 36.0 hours. If you take departure at 0800 (ZD +10), 29 October, what is your ETA (ZD +5) at the Panama Canal? 

    Y a. 1900, 13 November
    N b. 1400, 13 November
    N c. 1400, 14 November
    N d. 0900, 13 November
629: You are on a voyage from Belem, Brazil, to Mobile, AL. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate a layover in San Juan, Puerto Rico, of 17.5 hours. If you took departure at 2200 (ZD +3h 30m), 26 February , what was your ETA (ZD +6) at Mobile? 

    N a. 1900, 8 March
    Y b. 2200, 8 March
    N c. 0400, 9 March
    N d. 2200, 9 March
814: On 1 July , your 0515 zone time fix gives you a position of LAT 23°24.0'S, LONG 151°42.0'W. Your vessel is on course 240°T, and your speed is 10.0 knots. Local apparent noon (LAN) occurs at 1215 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 42°55.0'. What is the latitude at 1200 ZT? 

    N a. 24°02.5'S
    N b. 24°01.0'S
    Y c. 23°59.7'S
    N d. 23°58.6'S
1093: On 22 Nov. , your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0'S, LONG 42°40.0'W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix. NP-0023

    Y a. LAT 28°27.0'S, LONG 42°38.0'W
    N b. LAT 28°25.2'S, LONG 42°40.0'W
    N c. LAT 28°25.0'S, LONG 42°36.0'W
    N d. LAT 28°23.4'S, LONG 42°42.0'W
1291: As you pass Solitude Lt. (mile 249.0 AHP) which dayboard would you see? 

    Y a. Green diamond
    N b. Green square
    N c. Red triangle
    N d. Red diamond
1363: You are taking a time tick using the 1400 signal from Buenos Aires, Argentina. You hear a 0.4 second dash followed by a series of dots, noting that the 29th and the 56th to 59th dots are omitted. At the start of the following 0.4 second dash (which is followed by an 8 second pulse), the comparing watch reads 02h 00m 15s. When compared to the chronometer, the comparing watch reads 02h 01m 29s, and the chronometer reads 01h 59m 50s. What is the chronometer error? 

    N a. 0m 15s fast
    N b. 1m 14s fast
    Y c. 1m 24s slow
    N d. 1m 54s slow
1392: On 3 February , your 0550 zone time DR position is LAT 26°16.0'N, LONG 112°05.0'W. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time? 

    N a. Spica, Antares, Saturn
    N b. Vega, Antares, Dubhe
    N c. Venus, Regulus, Vega
    Y d. Spica, Kochab, Rasalhague
1480: On 28 November , your vessel's 0712 zone time DR position is LAT 26°54'S, LONG 45°18'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information.
Chronometer time: 10h 09m 18s Chronometer error: slow 02m 54s Gyro bearing: 102° 

    N a. 1.7°W
    Y b. 0.6°W
    N c. 1.1°E
    N d. 0.8°E
1494: On 5 August , your 0310 ZT position is LAT 09°02'N, LONG 21°08'W. You observe Polaris bearing 002°pgc. At the time of the observation the helmsman noted that he was heading 316°pgc and 329°psc. The variation is 15°W. What is the deviation for that heading? 

    N a. 0.0°
    N b. 1.5°W
    N c. 3.0°W
    Y d. 0.5°E
1565: 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.
1667: On Sunday, 8 November, your ship is enroute from Texas City, TX, to Portland, ME. At 0632 ZT, you fix your position at LAT 27°06'N, LONG 90°36'W. When the lower limb of the Sun was two-thirds of a diameter above the visible horizon, the Sun bore 105° per standard magnetic compass. At this time the chronometer read 12h 39m 20s and is 3m 20s slow. If the variation is 3°E, determine the deviation of the standard compass. 

    Y a. 0.8°E
    N b. 0.8°W
    N c. 3.8°E
    N d. 3.8°W
1710: What is the width of the navigable channel at Columbus Pt. Light (mile 936.0 AHP)? 

    N a. 200 ft.
    Y b. 300 ft.
    N c. 450 ft.
    N d. 750 ft.
1895: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 195°T at an observed altitude (Ho) of 03°30.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe? 

    Y a. Peacock
    N b. Schedar
    N c. Ankaa
    N d. Alioth
1929: You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PPE" repeated several times followed by a short dash (0.4 sec), 60 dots (0.1 sec each) and another short dash. At the beginning of the last dash, the comparing watch reads 07h 30m 13s. When compared to the chronometer, the comparing watch reads 07h 31m 56s, and the chronometer reads 07h 30m 21s. What is the chronometer error? 

    N a. 0m 13s fast
    N b. 1m 43s fast
    Y c. 1m 22s slow
    N d. 1m 48s slow
1960: The low water reference plane for Greenville Highway Bridge is 11.3 feet. If the Gage at the Greenville Highway Bridge reads 22.0 feet, what is the water level in relation to the low water reference plane (LWRP)? 

    N a. 22.1 feet below the LWRP
    N b. 10.7 feet below the LWRP
    Y c. 10.7 feet above the LWRP
    N d. 0.5  feet below the LWRP
2016: On 23 March , your 1600 ZT DR position is LAT 27°16.3'N, LONG 156°48.2'W. You are on course 063°T at a speed of 18.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time? 

    N a. Arcturus, Regulus, Sirius
    N b. Procyon, Sirius, Capella
    Y c. Hamal, Rigel, Alphard
    N d. Betelgeuse, Dubhe, Regulus
2017: On 2 February , your 0400 zone time DR position is LAT 24°14.0'N, LONG 163°28.0'W. You are on course 322°T at a speed of 22 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time? 

    Y a. Saturn, Antares, Rasalhague
    N b. Jupiter, Saturn, Polaris
    N c. Saturn, Polaris, Zubenelgenubi
    N d. Jupiter, Spica, Denebola
2086: Ar your current speed of 22 knots you only have enough fuel remaining to travel 440 miles. You must travel 618 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination? 

    N a. 17.8
    Y b. 18.6
    N c. 19.4
    N d. 20.2
2167: On 4 July , at 0630 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°15.0'S, LONG 21°20.0'W. Your vessel is steaming at 13.0 knots on a course of 146°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 10h 14m 27s, and the sextant altitude is 25°29.8'. The index error is 3.1' off the arc, and the chronometer error is 0m 53s slow. Your height of eye on the bridge is 48.0 feet. What is the azimuth (Zn) of this sight using the assumed position? 

    Y a. 049.5°T
    N b. 052.6°T
    N c. 054.3°T
    N d. 058.9°T
2180: On 12 April , at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What are the intercept (a) and azimuth (Zn) from the assumed position of this sight? 

    N a. Zn 057.7°,  a 15.4' T
    Y b. Zn 057.0°,  a 17.7' A
    N c. Zn 122.3°,  a 17.7' A
    N d. Zn 123.0°,  a 22.7' A
2685: You are steering 031°T, and a light is picked up dead ahead at a distance of 12.7 miles at 0017. You change course to pass the light 3.5 miles off abeam to starboard. If you are making 11 knots, what is your ETA at the position 3.5 miles off the light? 

    N a. 0118
    N b. 0121
    Y c. 0124
    N d. 0127
2687: While on a course of 321°T, a light bears 7° on the starboard bow at a distance of 9.7 miles. What course should you steer to pass 3.5 miles abeam of the light leaving it to starboard? 

    N a. 297°T
    N b. 300°T
    N c. 303°T
    Y d. 307°T
2703: You are underway on course 254°T at a speed of 16.5 knots. You sight a rock bearing 255°T at a radar range of 6.1 miles at 0916. If you change course at 0922, what is the course to steer to leave the rock abeam to starboard at 1.5 miles? 

    N a. 268°T
    N b. 239°T
    Y c. 236°T
    N d. 233°T
2781: Your engine speed is 9.8 mph and you estimate the current at 1.6 mph. What is your speed over the ground? 

    N a. 11.0 mph
    N b. 9.8 mph
    N c. 8.6 mph
    Y d. 8.2 mph
3062: The propeller on your vessel has a pitch of 22.8 feet. From 0800, 18 April, to 1020, 19 April, you steamed an observed distance of 403.6 miles. If your average RPM was 74, what was the slip? 

    N a. +7.0%
    N b. -7.0%
    Y c. +8.0%
    N d. -8.0%
3096: If the pitch of the propeller is 20.1 feet, and the revolutions per day are 118,178, calculate the day's run allowing 6% negative slip. 

    N a. 367.2 miles
    N b. 381.6 miles
    N c. 398.4 miles
    Y d. 414.1 miles
3763: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 178°T, and the variation is 9°W. If the heading of your vessel at the time of the sighting is 180° per standard magnetic compass, what is the deviation? 

    N a. 2°E
    N b. 2°W
    Y c. 7°E
    N d. 7°W
10200: YourGPS position is LAT 41°10.0'N, LONG 72°52.5'W. What is the course per standard magnetic compass to a position one mile due south of Falkner Island Light? 

    N a. 065°psc
    N b. 081°psc
    Y c. 093°psc
    N d. 097°psc
11407: At 1930 your GPS position is LAT 41°00.5'N, LONG 72°49.5'W. At 2018 your position is LAT 41°08.6'N, LONG 72°41.6'W. What was your true course and speed made good? 

    N a. 219° at 10.1 knots
    N b. 214° at 12.5 knots
    Y c. 036° at 12.6 knots
    N d. 039° at 11.2 knots
12500: You are on course 135° per standard magnetic compass when you take the following bearings per standard magnetic compass: Cape Henry Light 266° Cape Charles Light 353°Chesapeake Light 124° What is your position? 

    Y a. LAT 36°57.3'N, LONG 75°50.9'W
    N b. LAT 36°57.5'N, LONG 75°50.1'W
    N c. LAT 36°57.6'N, LONG 75°51.6'W
    N d. LAT 35°57.9'N, LONG 75°50.8'W
12509: You are on course 027° per magnetic compass when you take the following bearings per magnetic compass: New Point Comfort Light "2" 253°
Horn Harbor Entrance Light HH 282°
Wolf Trap Light 348°
What is the position of the fix? 

    N a. LAT 37°19.4'N, LONG 76°09.5'W
    N b. LAT 37°19.4'N, LONG 76°09.8'W
    N c. LAT 37°19.7'N, LONG 76°10.3'W
    Y d. LAT 37°19.7'N, LONG 76°09.9'W
13002: At 0829 your position is LAT 41°02.9'N, LONG 72°57.4'W. You are making turns for 8.5 knots. What is your ETA at a position midway between buoys "1" and "2" at the entrance of New Haven Outer Channel? 

    N a. 0925
    N b. 0931
    N c. 0938
    Y d. 0944
13709: Anchorage regulations for this area may be obtained from __________. 

    Y a. Office of the Commander 5th Coast Guard District
    N b. Commanding General, Corps of Engineers, Washington, DC
    N c. Virginia - Maryland Pilots Association
    N d. Chesapeake Bay Port Authority, Hampton, VA
15029: What type of daymark will you see as you approach Gold Dust Bar Light (mile 793.3 AHP) ? 

    Y a. Red diamond
    N b. Red triangle
    N c. Green square
    N d. Green diamond
15110: From your 1752 position, you steer 307°pgc at 9 knots. At 1805, you obtain the following visual bearings:

Old Pt. Comfort Light 232°pgc.
Chesapeake Bay Tunnel North Light 130°pgc.

What are the latitude and longitude of you 1805 position? 

    N a. LAT 37°06.1'N,  LONG 76°08.1'W
    N b. LAT 37°06.0'N,  LONG 76°08.4'W
    N c. LAT 37°05.9'N,  LONG 76°07.7'W
    Y d. LAT 37°05.9'N,  LONG 76°08.0'W
15429: What is the vertical clearance of the Vicksburg Highway 80 Bridge when the river level is the same as the Low Water Reference Plane? The low water reference plane (LWRP) for Vicksburg, MS. is 0.1. 

    N a. 128.3 ft
    N b. 125.6 ft
    N c. 119.5 ft
    Y d. 116.1 ft
15440: Your ETA at Chesapeake Bay Bridge and Tunnel between trestles B + C is 2300. If your engine speed is 9.8 knots,
what will be your approximate speed over the ground, at that time, allowing for the predicted current? 

    N a. 7.0 knots
    N b. 8.2 knots
    N c. 11.4 knots
    Y d. 12.5 knots
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.
15758: What is your ETA at point "A"? 

    N a. 0637
    N b. 0643
    Y c. 0649
    N d. 0700
15770: At 0930, your position is LAT 41°16.5'N, LONG 71°41.4'W, and you are turning for 7 knots. Allowing 3° leeway for northerly winds and estimating the current as 035° at 0.3 knot, what is the course to steer (pgc) to point "B"? 

    N a. 084°pgc
    Y b. 086°pgc
    N c. 091°pgc
    N d. 094°pgc
15820: You are northwest of Port Jefferson Harbor steering 242° per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________. 

    N a. 140°psc
    N b. 146°psc
    Y c. 157°psc
    N d. 160°psc
16245: At 2259 Cape Henry Light bears 250°T, Chesapeake Light bears 122°T, and North Chesapeake Entrance Lighted Whistle Buoy "NCA" has a radar range of 1.8 miles. Which statement is TRUE? 

    N a. The course made good is 226°T.
    N b. You are in the red sector of Cape Henry Light.
    N c. You are in a submerged submarine transit lane.
    Y d. Chesapeake Light is 7.6 miles off.
16407: At 0227, you are on course 087°T at 10 knots. What course per standard magnetic compass should you steer to make good your true course? 

    N a. 099°psc
    N b. 102°psc
    Y c. 105°psc
    N d. 109°psc
16409: At 0337, fog closes in and you anchor under the following radar ranges and bearing.

South tip of Watch Hill Point 3.0 miles
East point of Fishers Island 1.4 miles
Latimer Reef Light 331°T

What is the approximate depth of water at your anchorage? 

    N a. 83 feet (25.2 meters)
    Y b. 100 feet (30.3 meters)
    N c. 120 feet (36.4 meters)
    N d. 135 feet (40.9 meters)
16565: You decide to use the 9960-Y and 9960-W rates. At 1915,
you obtain the following readings:

9960-Y-43937.5
9960-W-14651.2

What is your 1915 position? 

    N a. LAT 41°13.6'N, LONG 71°54.0'W
    Y b. LAT 41°13.5'N, LONG 71°53.4'W
    N c. LAT 41°13.4'N, LONG 71°53.1'W
    N d. LAT 41°14.4'N, LONG 71°53.7'W