单项选择题

Insufficient space between the hull and bottom in shallow water will prevent normal screw currents resulting in （）.

A.waste of power
B.sudden sheering to either side
C.sluggish rudder response
D.All of the above

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单项选择题

A.List of Lights
B.Coast Pilot
C.Sailing Directions
D.List of Radiobeacons

单项选择题

A.notify the Captain as soon as possible
B.seek clarification from the pilot
C.take action by his own judgment
D.cease the duty of pilot's at once

单项选择题

A.being rigged combined
B.is rigged combining
C.rigs combining
D.is rigged combined