单项选择题
A lookout can leave his station（）.
A.at the end of the watch B.at any time C.ONLY when properly relieved D.15 minutes before the end of the watch
单项选择题 A look-out at the bow sights an object on your port side. How many bell strokes should he sound? （）
单项选择题 A helmsman receives the command Right 15 degrees rudder. The helmsman’s IMMEDIATE reply should be（）.
单项选择题 “How do you read?” “I read you four”（）.
