A hook that will release quickly is a（）.

单项选择题（）should not be considered as components as fire installations.

A.fire pumps
B.fire mains
C.hydrants and hoses
D.closing appliances which are kept permanently closed at sea

单项选择题（） is not the information necessary for the master to obtain guidance as to the stability of the ship.

A.a curve of minimum operational metacentric height（GM）versus draught
B.instructions concerning the operation of cross-flooding arrangements
C.the signals or lights being exhibited or sounded
D.all other data and aids which might be necessary to maintain stability after damage

单项选择题Which document lists all the lifesaving equipment required for a vessel? （）

A.Certificate of Inspection
B.American Bureau of Shipping Classification Certificate
C.International Convention for the Safety of Life at Sea Certificate
D.Certificate of Registry

单项选择题Where will you find the requirements for the signals that must be sounded by a mobile offshore drilling unit that is being towed through an area of restricted visibility? （）

A.COLREGS
B.MMS Rules
C.SOLAS Convention
D.Coast Pilot

单项选择题What is the period of validity of the SOLAS required Cargo Ship Safety Construction Certificate? （）

A.12 months
B.24 months
C.48 months
D.60 months