单项选择题
A.to right the raft if it capsizes B.to carry the raft around on deck C.for crewmen to hang on to D.to hang the raft for drying
Halon fire extinguishers are NOT effective when used on...
单项选择题Halon fire extinguishers are NOT effective when used on which types of fires?（）
A.Fires in electrical equipment B.Flammable oils and greases C.Class "A" fires in ordinary combustibles D.Materials containing their own oxygen
Guide tolerances during elevation of the jack-up rig wi...
单项选择题Guide tolerances during elevation of the jack-up rig will（）.
A.reduce spud can bearing pressure B.keep the unit level and reduce overloading C.reduce stresses on the hull D.minimize the potential for punch-through
Great Salt Pond on Block Island is（）.A.entered through ...
单项选择题Great Salt Pond on Block Island is（）.
A.entered through a dredged cut B.not accessible in easterly gales C.available for vessels up to a maximum draft of 8 feet (2.4m) D.not affected by the tide
