單項(xiàng)選擇題A pilot chart does NOT contain information about ().

A.average wind conditions
B.tidal currents
C.magnetic variation
D.average limits of field ice


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1.單項(xiàng)選擇題A petroleum liquid has a flash point of 85°F. This is a grade ().

A.B flammable liquid
B.C flammable liquid
C.D combustible liquid
D.E combustible liquid

2.單項(xiàng)選擇題A negative metacentric height ().

A.should always be immediately corrected
B.will always cause a vessel to capsize
C.always results from off-center weights
D.All of the above are correct

3.單項(xiàng)選擇題A navigator fixing a vessel’s position by radar ().

A.can use radar information from one object to fix the position
B.should never use radar bearings
C.should only use radar bearings when the range exceeds the distance to the horizon
D.must use information from targets forward of the beam

4.單項(xiàng)選擇題A natural fiber rope can be ruined by dampness because it may ().

A.rot
B.shrink
C.stretch
D.unlay

5.單項(xiàng)選擇題A mooring line leading at nearly right angles to the keel is a ().

A.spring line
B.bow line
C.stern line
D.breast line