單項(xiàng)選擇題()is the navigational timekeeper of the vessel.

A.The marine sextant
B.The chronometer
C.The magnetic compass
D.The gyrocompass


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1.單項(xiàng)選擇題()is used for measuring horizontal and vertical angles.

A.The marine sextant
B.Thechronometer
C.The magnetic compass
D.The gyrocompass

2.單項(xiàng)選擇題()means rudder to be held in the force and aft angles.

A.Steady
B.Meet her
C.Midships
D.Stop engines

3.單項(xiàng)選擇題()means check the swing of the vessel’s head in a turn.

A.Steady
B.Meet her
C.Midships
D.Stop engines

5.單項(xiàng)選擇題A ship is side to be()when the whole ship moves bodily to port and then to starboard.

A.rolling
B.pitching
C.heaving
D.swaying