单项选择题
A.must be wet before it will release B.should be kept in a watertight cover except in an emergency C.will inflate the raft in its cradle if operated manually D.must be submerged to a certain depth to release automatically
A.is a deck fitting used to shackle gear to the deck B.permits easy jettisoning of deck cargo in an emergency C.prevents stress concentration in the bulwark D.provides openings through the bulwark for mooring lines
A.at the bow B.at the stern C.in the middle D.all around