Mate OSV Practice Test

1. 1. Which term is sometimes used to refer to a disk with a horizontal line through its center, equivalent to the summer load line on a vessel?
2. 2. When a vessel is entering or leaving a port, where is the record of engine speeds kept?
3. 3. When discharging clean ballast prior to entering a loading port, what must you do if it is determined the ballast exceeds 15 parts per million of oil?
4. 4. According to regulations, which choice depicts the bursting pressure of a cargo hose used for transferring liquefied gases?
5. 5. Providing you are not in a special area, such as the Mediterranean or Red Sea, how many nautical miles from land must you be to throw wooden dunnage into the se...

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1. 1. Utilizing the illustration of the fire control plan of the lower engine room, what does the arrow between frames 135 and 140 represent?
2. 2. While operating off Panama a seaman is injured. What indicator should be included in the preamble of a radio telegram requesting medical advice from a Panamania...
3. 3. Which is TRUE of the term negative slip on a vessel?
4. 4. You are in a lifeboat broadcasting a distress message. What information would be essential to your rescuers?
5. 5. The vessel shown in the illustration has broken down and you are going to take her in tow. The wind is on her starboard beam. She is making more leeway than you...

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1. 1. The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?
2. 2. ECDIS units incorporate Digital Chart Data that utilizes which formats?
3. 3. What is a common unit of measure for atmospheric pressure?
4. 4. In both regions of the IALA buoyage system, which topmark shown in illustration D022NG below is used on a special mark?
5. 5. Considering the general circulation of the atmosphere, what is the name given to the wind system between latitudes 30°N and 60°N?

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1. 1. You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?
2. 2. Lines drawn through points on the Earth having the same atmospheric pressure are known as __________.
3. 3. Red lights may appear on which buoys?
4. 4. Which is a characteristic of a port side daymark?
5. 5. The velocity of the wind, its steady direction, and the amount of time it has blown determines what about a wind driven current?

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1. 1. Your position is LAT 40°59.0'N, LONG 73°06.2'W. What is the course psc to New Haven Harbor Lighted Whistle Buoy "NH"?
2. 2. You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time will you sight New Haven Light if the vi...
3. 3. At 2142, you take the following bearings: Stratford Point Light 331°T Stratford Shoal Middle Ground Light 280°T Old Field Point Light 223°T What is your 2142 po...
4. 4. What was the speed made good between 2114 and 2142?
5. 5. At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven...

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1. 1. On 9 November 2023 at 0330, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). What is the direction and velocity of the current you are encount...
2. 2. The propeller on a vessel has a diameter of 21.5 feet and a pitch of 24.5 feet. What would be the apparent slip if the vessel cruised 458 miles in a 23 hour day...
3. 3. On 4 October 2023, you will be docking at Redwood Marine Terminal in Eureka, CA at the first high tide. The berth is located between NOAA reference tidal statio...
4. 4. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a mag...
5. 5. At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above t...

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1. 1. On 7 November your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Loca...
2. 2. On 14 October your 0800 zone time (ZT) dead reckoning position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 knots. What...
3. 3. Your vessel is steering course 027° per standard magnetic compass (psc), variation for the area is 19°W, and deviation is 2°E. The wind is from the north-northw...
4. 4. On 16 April your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Dete...
5. 5. 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.

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