单项选择题
If you see someone fall overboard from a vessel，you should（）.
A.immediately jump in the water to help 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 control room for the distress flares
单项选择题 A sound signal of seven short blasts and one long blast given with the vessel’s sound system is（）.
单项选择题 PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）.
单项选择题 Is extra power available（）emergency while maneuvering?
