单项选择题
A.stop the flow of oil at the main deck manifold
B.prevent the oil from leaving the shore facility
C.prevent the oil from siphoning through the pump
D.None of the above
单项选择题 If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit，you should（）.
单项选择题 Hand holds or straps on the underside of an inflatable liferaft are provided（）.
单项选择题 Each commercial fishing vessel must have at least one immersion suit，exposure suit，or life preserver for each（）.