单项选择题
A.The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
B.The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
C.The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the falls
D.The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls
单项选择题 A self-righting survival craft will return to an upright position provided that all personnel（）.
单项选择题 A lifeboat is weight tested by lowering to near the waterand loading to capacity with weight evenly distributed. Itis then lowered into the water and released. This test mustbe done at least once every（）.
单项选择题 A fully loaded motor-propelled lifeboat must be capable of attaining a speed of at least（）.