單項選擇題

Mariners should ensure correct（）of aids to navigation during twilight periods when some lighted aids to navigation are lit while others are not.

A.identification
B.distinction
C.discrimination
D.clearly seeing

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單項選擇題

If the winch should fail while you are hauling in the anchor，what prevents the anchor cable from running out（）.

A.Chain stopper
B.Devil's claw
C.Hawse ratchet
D.Riding pawl

單項選擇題

If the ship is alongside the wharf，what kind of（）is used?

A.pilot ladder
B.rope ladder
C.rod ladder
D.accommodation ladder