A.use the float-free method only
B.lower all boats
C.raise all boats
D.drill is over，secure all boats

A.Only when there is a chance of their being seen by rescue vessels
B.At half-hour intervals
C.At one-hour intervals
D.Immediately upon abandoning the vessel

A.before the boat is lowered from the stowed position
B.as the boat-fall blocks break clear of the davit head
C.before the boat is lowered from the embarkation level
D.after the boat is released into the water

A.approach while coming to the left to take advantage of the current
B.drop an anchor outside the surf line，then pay out anchor line over the bow while the seas carry the boat toward the beach
C.approach slow enough so that the boat can be brought around to meet breaking seas on the bow
D.rig a drogue with tripping line over the bow，back ashore with drogue tripped between breakers

A.astern and the victim just off the bow
B.ahead and the victim just off the bow
C.just off the bow and the victim to windward
D.just off the bow and the victim to leeward