单项选择题
Which person may command a lifeboat in ocean service?（）
A.Licensed deck officer B.Able seaman C.Certificated person D.All of the above
单项选择题 Which item of lifeboat equipment would be most suitable for night signaling to a ship on the horizon?（）
单项选择题 Which item is NOT required to be marked with the vessel’s name?（）
单项选择题 Which is TRUE concerning immersion suits and their use?（）
