Master under 500-1600 GRT Practice Test

1. 1. For towing vessels over 100 gross tons that are permitted to maintain a two-watch system, what percentage of the deck crew must be able seamen?
2. 2. You are docking a vessel starboard side to with the assistance of two tugs. You are attempting to hold the vessel off by operating both tugs at right angles to...
3. 3. Which of the following describes (auto) ignition temperature?
4. 4. When picking up your mooring at the buoy, which is the correct method?
5. 5. What is the term that refers to the loss of cargo space due to irregular package dimensions, curved cargo packaging and dunnage?

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1. 1. In the illustration, which item number correctly identifies the hydrostatic release?
2. 2. What is the most probable cause of reduced capacity in a reciprocating air compressor?
3. 3. Your vessel is damaged and listing to port. The rolling period is long, and the vessel will occasionally assume a starboard list. Which action should you take F...
4. 4. Which is the MOST important consideration for a tank vessel?
5. 5. Which signaling devices are required on inflatable liferafts?

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1. 1. Your vessel has a metacentric height of 1.12 feet and a beam of 60 feet. What will your average rolling period be?
2. 2. Using the information in Section 1, the blue pages, of the Stability Data Reference Book, determine the danger angle for permanent list if the KG is 22.2 feet a...
3. 3. What is used as an indicator of initial stability?
4. 4. The SS AMERICAN MARINER is ready to bunker with drafts of FWD 11'-01", AFT 15'-01". After all bunkers are on board, soundings indicate the tonnages shown in the...
5. 5. You have 590 tons of below deck tonnage. There is no liquid mud aboard. If you have 84 tons of cargo above deck with a VCG above the deck of 2.7 feet, what is t...

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1. 1. What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?
2. 2. You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?
3. 3. Which statement about a gnomonic chart is correct?
4. 4. Which defines the term relative humidity?
5. 5. You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?

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1. 1. Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have which of the following?
2. 2. Which is TRUE concerning magnetic compass deviation?
3. 3. The magnitude of three stars is indicated. Which star is the brightest?
4. 4. Which Naval Control of Shipping publication should be aboard your vessel?
5. 5. You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?

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1. 1. A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
2. 2. At 2000 Hog Island Lighted Bell Buoy "12" bears 199°T and Buoy "GM" bears 249°T. What is your position?
3. 3. From your 2000 position you change course to 206°T. What time would you expect to be abeam of Hog Island Buoy "12"?
4. 4. You should expect to pass how far off buoy "12"?
5. 5. At 2030 you take the following bearings: Sand Shoal Inlet South Light - 275°T Cape Charles Light - 235°T What is the set and drift from 2000 to 2030?

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1. 1. On 10 August your vessel's 0426 zone time DR position is LAT 52°07'N, LONG 142°16'E, when an amplitude of the Sun is observed. The Sun's lower limb is about 20...
2. 2. The true course between two points is 106°. Your gyrocompass has an error of 2°E and you make an allowance of 2° leeway for a south wind. What gyro course shoul...
3. 3. On 14 January your 0746 zone time DR position is LAT 26°37.0'N, LONG 153°19.0'W. At that time, you observe the Sun bearing 123°psc. The chronometer reads 05h 49...
4. 4. On 10 November 2023 at 2130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transit 15nm and make good 12.5 knots to a bert...
5. 5. 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 lay...

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1. 1. On 18 November your 1750 zone time DR position is LONG 110°16.0' W. At that time you observe Polaris with a sextant altitude (hs) of 21°29.8'. The chronometer t...
2. 2. A vessel steams 580 miles on course 083°T from LAT 13°12'N, LONG 71°12'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?
3. 3. On 18 August at 0600 ZT, morning stars were observed, and the vessel's position was determined to be LAT 19°48'N, LONG 108° 34'W. Your vessel is steaming on cou...
4. 4. Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from Valdez, AK, to Hilo, HI, is TRUE.
5. 5. On 20 November your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bodies. Dete...

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1. 1. In a foreign port with a consulate, the U.S. Consul may excuse the Master from personally appearing before him to consent to the mutual release of an injured se...
2. 2. Which indicates the holding capability of an anchor?
3. 3. When is the best time to work a boat into a slip?
4. 4. What is one of the main purposes of dunnage?
5. 5. Under which circumstance is a 30,000 DWT tankship required to have an IOPP certificate?

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1. 1. What is the function of the international shore connection onboard a vessel?
2. 2. You are involved in an emergency landing of a helicopter on the water. When should you inflate your life jacket?
3. 3. Which term describes the strengthening of damaged bulkheads by using wood or steel?
4. 4. The greatest effect on stability occurs from loose liquids flowing __________.
5. 5. Your vessel has run aground in waters where the tide is falling. Which of the following is the best action you can take?

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1. 1. What describes a flood current?
2. 2. Which of the following is the most accurate method of determining gyrocompass error while underway?
3. 3. In modern fathometers, what produces the sonic or ultrasonic sound waves?
4. 4. Where would you find information about the time of high tide at a specific location on a particular day of the year?
5. 5. Your vessel is on a course of 207°T at 13 knots. At 0539 a light bears 180.5°T, and at 0620 the light bears 162°T. At what time and at what distance off will yo...

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1. 1. A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
2. 2. At 1705: Race Rock Light bears 099°True, Orient Point Light bears 176°True, Bartlett Reef Light bears 083°True. What is your vessel's position?
3. 3. If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?
4. 4. At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°T. At 1750 Race Rock Light bears 336°T, Little...
5. 5. If your fathometer is set on fathoms, what should your fathometer read at 1750?

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1. 1. In which situation could a vessel most easily capsize?
2. 2. What does the line labeled "MS" indicate on the Great Lakes load line model shown in illustration D031DG below?
3. 3. How are nautical charts published by the Canadian Hydrographic service which are referenced in the United States Coast Pilot identified?
4. 4. Which term defines when a vessel is swinging from side to side off course due to quartering seas?
5. 5. When running before a heavy sea, what will moving weights aft on the vessel accomplish?

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1. 1. At 0825 on 08 March, you get underway from the docks at mile 173.0 (AHP), enroute to the docks at mile 179.0 (UMR) in St. Louis, MO, with a tow of eight barges...
2. 2. You are approaching the Baton Rouge R.R. and Hwy 190 Bridge mile 233.9 (AHP). What is the horizontal clearance of the channel span?
3. 3. You are turning for 9 mph, approaching Fort Adams Lt. (mile 311.4 AHP) and it is reported that the current at Knox Landing is estimated at 4.5 MPH. Which of the...
4. 4. At 0715, on March 9, you pass Knox Landing Gage at mile 313.8 (AHP) and estimate the current will average 3.5 mph for the remainder of the time on the Mississip...
5. 5. What is the vertical clearance between the highest point of your towboat, if it is 45 feet above the water, and if the Natchez Gage reads 23.4 feet when passing...

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