单项选择题
A person who sees someone fall overboard should（）.
A.immediately jump into the water to assist the individual B.call for help and keep the individual in sight C.run to the radio room to send an emergency message D.go to the bridge for the distress flares
单项选择题 A person who sees someone fall overboard should（）.
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（）.
