单项选择题
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 hydrostatic release mechanism for a liferaft（）.A.must...
单项选择题A hydrostatic release mechanism for a liferaft（）.
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 CLEARLY MARKED WAY IN THE VESSEL WHICH HAS TO BE FOLL...
单项选择题A CLEARLY MARKED WAY IN THE VESSEL WHICH HAS TO BE FOLLOWED IN CASE OF AN EMERGENCY defines（）.
A.Escape route B.Alley way C.Corridor D.Embarking way
