单项选择题
Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.
A.Directly under the boom B.Moving away from the boom C.Stopped dead in the water D.Tied to the boom
单项选择题 An orange flag showing a black circle and square is a（）.
单项选择题 An inflatable liferaft should be manually released from its cradle by（）.
单项选择题 An inflatable liferaft is hand-launched by（）.
