单项选择题
A person who sees someone fall overboard should（）.
A.call for help and keep the individual in sight B.run to the radio room to send an emergency message C.immediately jump in the water to assist the individual D.go to the bridge for the distress flares
单项选择题 A person who observes an individual fall overboard from an OSV should（）.
单项选择题 A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.
单项选择题 If you see someone fall overboard from a vessel，you should（）.
