单项选择题
Which statement is TRUE concerning lifeboat gripes?（）
A.They must be released by freeing a safety shackle B.They should not be released until the boat is in lowering position C.They may be adjusted by a turnbuckle D.They are normally used only with radial davits
单项选择题 Which statement concerning the collection of fresh water is FALSE?（）
单项选择题 Which sequence is correct when launching a lifeboat stowed in gravity davits?（）
单项选择题 Which person may command a lifeboat in ocean service?（）
