A device used to tighten up remaining slack in wire rope when you are making up to a tow in inland waters is a（）.

单项选择题A bridle for an ocean tow consists of（）.

A.two chains of equal length
B.a single nylon pendant rove through a heavy ring free to move on the pendant
C.two long legs of wire rope shackled to a fishplate
D.a single length of heavy chain with both ends secured on deck to welded pad eyes

单项选择题A bollard is found on the（）.

A.beach
B.deck
C.pier
D.towed vessel

单项选择题A “stopper” is（）.

A.a short length of line used for temporarily holding another line
B.a snatch block for handling a topping lift
C.an engine order telegraph
D.the brake on a cargo winch

单项选择题（）about 20 sq.m to be sand-blasted.

A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area