A.extending out from a bluff alongside the river
B.that tends to give a false indication of its position
C.that has a sharp drop off into deep water
D.that is perpendicular to the current
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A.blocks have been overhauled
B.hauling parts of two tackles are attached
C.hauling part leads through the movable block
D.hauling part leads through the standing block
A.one
B.two
C.three
D.four
A.emergency gear
B.drainage
C.deck cargo storage
D.securing gear
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Bilge keels are fitted on ships to（）.
On a ship，the deck stringer is the outboardmost deck（）.
Pollution regulations require that each scupper in an enclosed deck area have a（）.
Shell plating is（）.
The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.
Regulations require that access to a cargo pumproom in a tanker carrying grade D liquid cargo，shall be（）.
Prior to magnetic particle inspection of anchor chain，the chain should be（）.
The opening in the deck that leads the anchor cable outside the hull is the（）.
The purpose of cant frames in steel vessels is（）.
Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.