A.help keep the deck dry
B.prevent stress concentrations on the stringer plate
C.protect against twisting forces exerted on the frame of the vessel
D.reinforce the side stringers
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A.plating
B.beam
C.stiffener
D.stanchion
A.located next to and parallel to the keel
B.located next to and parallel to the gunwale
C.another term for the bilge keel
D.another term for the rub rail
A.increased capacity to set flooding boundaries
B.decreased capacity to set flooding boundaries
C.reduced compartmentation
D.greater deck load capacity
A.doggers
B.fidleys
C.freeing ports
D.swash ports
A.displacement in metric tons
B.total weight including cargo
C.volume in cubic feet
D.the volume of the enclosed space
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Owing to the greater girth of a ship amidships than at the ends，certain strakes are dropped as they approach the bow and stern to reduce the amount of plating at the ends. These strakes are called（）.
The purpose of cant frames in steel vessels is（）.
The Tonnage Certificate indicates（）.
The athwartship hull structural members of a ship are（）.
The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.
On a ship，the deck stringer is the outboardmost deck（）.
The perforated，elevated bottom of the chain locker，which prevents the chains from touching the main locker bottom and allows seepage water to flow to the drains，is called a（）.
In vessel construction，a greater number of watertight bulkheads results in（）.
The machinery associated with heaving in and running out anchor chain is the（）.
A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.