单项选择题
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
单项选择题 If the ship is alongside the wharf，what kind of（）is used?
单项选择题 If a ship has sternway，with accommodation block aft，she may settle with the wind（）.
单项选择题 Conventional anchors are least likely to hold in a bottom consisting of（）.
