One nautical mile is the length of an arc of great circle which subtends an angle of ()at the centre of the earth.
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In Admiralty Sailing Directions，bands is the word used to indicate ______ markin
- A.horizontal
- B.vertical
- C.diagonal
- D.vertical or diagonal
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______ is not suitable for bagged cargo.
- A.The hydraulic crab
- B.The rope sling
- C.The canvas sling
- D.The cargo tray
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When making a Scharnow turn，the ().
- A.Rudder must be put over towards the side the man went over
- B.Initial turn direction is away from the side the man went over
- C.Rudder is put hard over and the initial turn is maintained until about 240° from the original course
- D.Man overboard must be not more than 300 feet astern when starting the turn
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The navigator is concerned with three systems of coordinates.Which system is not of major concern __.
- A.Terrestrial
- B.Ecliptic
- C.Celestial horizon
- D.Celestial equator
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The objective of shoring a damaged bulkhead is to ().
- A.force the warped，bulged，or deformed sections back into place
- B.support and hold the area in the damaged position
- C.withstand subsequent additional damage
- D.make a watertight seal at the damaged area
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SAFE SPEED is defined as that speed where ().
- A.you can stop within your visibility range
- B.you can take proper and effective action to avoid collision
- C.you are traveling slower than surrounding vessels
- D.no wake comes from your vessel
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We will ______ special attention to the dangerous cargo.
- A.Put
- B.Make
- C.Take
- D.Pay
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My gyro-compass ()is two degrees east.
- A.trouble
- B.error
- C.wrong
- D.mistake
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The period of roll is the time difference between ().
- A.Zero inclination to full inclination on one side
- B.Full inclination on one side to full inclination on the other side
- C.Full inclination on one side to the next full inclination on the same side
- D.Zero inclination to the next zero inclination
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When turning a vessel in shallow water，which statement is TRUE ().
- A.The rate of turn is increased
- B.The rate of turn is decreased
- C.The turning diameter increases
- D.The turning diameter remains the same
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