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
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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
A.parallel to the longitudinal direction of the chain
B.perpendicular to the direction of the anchor chain
C.diagonally across the link of the anchor chain
D.around the circumference of the chain link
A.oil from flowing out of the tank vent
B.air from entering the tank vent
C.vapors from leaving the tank vent
D.flames on deck from entering the tank vent
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Shell plating is（）.
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（）.
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（）.
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（）.
Fuel oil tank vents are fitted with a screen which will stop（）.
On a ship，the deck stringer is the outboardmost deck（）.
Grinding to eliminate shallow surface defects should be done（）.
One function of a bulwark is to（）.
Freeboard is measured from the upper edge of the（）.
The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.