Second/Third Mate of Unlimited Tonnage Practice Test

1. 1. You are heading into the sea during rough weather. What may happen if there is too much weight forward in your small boat?
2. 2. When making way in heavy seas you notice that your vessel's screw is being lifted clear of the water and racing. Which action will correct the situation?
3. 3. Your vessel is broken down and rolling in heavy seas. How can you reduce the danger of capsizing?
4. 4. You are conducting trials to determine the maneuvering characteristics of your vessel. While making a turn, you take ranges and bearings of an isolated light. T...
5. 5. You have determined the maneuvering characteristics of your vessel by taking the radar ranges and bearings of an isolated light while making a turn. The results...

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1. 1. A fire starts on your vessel while refueling. Which action should you take FIRST?
2. 2. Your vessel displaces 497 tons. The existing deck cargo has a center of gravity of 2.5 feet above the deck and weighs 24 tons. If you load 18 tons of ground tac...
3. 3. What is the function of wearing rings found on some centrifugal pumps?
4. 4. The percentage of the total surface area or volume of a flooded compartment that can be occupied by water caused by damage is known as __________.
5. 5. You are at sea in an inflatable liferaft. In high latitudes, the greatest danger is __________.

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1. 1. A tropical storm is a tropical cyclone that generates winds of which speed?
2. 2. Charts should be corrected by using information published in which text?
3. 3. Which is TRUE concerning air masses near the earth's surface?
4. 4. The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.
5. 5. Which of the following is the most accurate method of determining gyrocompass error while underway?

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1. 1. Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. Which is the mean time and date at Greenwich?
2. 2. Under the U.S. Aids to Navigation System, which category is a yellow buoy?
3. 3. You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center o...
4. 4. The survey information upon which a chart is based is found __________.
5. 5. Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.

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1. 1. At 0610, you take the following observations: Point Judith Light – 010°pgc Point Judith Harbor of Refuge Main Breakwater Center Light – 297°pgc Point Judith Har...
2. 2. Which of the following best describes Point Judith Harbor of Refuge?
3. 3. At 0610 you are on a course 240°pgc at 15kts. What is the course per standard magnetic compass?
4. 4. Which of the following describes the bottom in the vicinity of 1nm due West(270°T) of your position?
5. 5. Your meteorological visibility is 5.5 nautical miles. At what distance will you be able to sight Point Judith Light(20M)?

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1. 1. On 9 November 2023 at 1630, 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 21.2 feet and a pitch of 20.0 feet. What would be the apparent slip if the vessel cruised 391 miles in a 24 hour day...
3. 3. You depart LAT 33°45.0'N, LONG 118°30.0'W, and steam 2216 miles on course 250°T. What is the longitude of your arrival by Mercator sailing?
4. 4. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a mag...
5. 5. On 5 October 2023, you will be docking at the Redwood Marine Terminal in Eureka, CA at the first high tide. The berth is located between NOAA reference tidal st...

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1. 1. On 17 March your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 313°T at an observed altitude (Ho) of 43°03.8'. The...
2. 2. 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 lat...
3. 3. On 7 December your 0350 ZT position is LAT 35°42'N, LONG 17°38'E. You observe Polaris bearing 359.7°pgc. At the time of the observation the helmsman noted that...
4. 4. You observe the lower limb of the Sun at a sextant altitude (hs) of 45°49.7' on 13 November . The index error is 1.0' on the arc. The height of eye is 61 feet (...
5. 5. 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...

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