单项选择题
A.immediately jump in the water to assist the individual
B.go to the bridge for the distress flares
C.run to the radio room to send an emergency message
D.call for help and keep the individual in sight
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 A flooded lifeboat on board a vessel would adversely affect the vessel’s stability by（）.
单项选择题 A crew member has just fallen overboard off your port side．Which action should you take （）.