A.effect of the propeller flow on the rudders
B.water flow due to the vessel's movement through the water
C.tunnel affect of the water flow past opposing rudders
D.discharge current being channeled to impinge on the vessel's deadwood
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A.on
B.to
C.up
D.with
A.filling a partially filled tank
B.using an on board crane to lift a freely swinging heavy object
C.emptying a partially filled tank
D.transferring ballast from the forepeak to the after peak
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Why is it necessary to extend ventilators of gasoline powered vessels to the bilges（）.
What is the purpose of cant frames in steel vessels? （）
Which space（s）is（are）deducted from gross tonnage to derive net tonnage（）.
The riding pawl is（）.
The section of each end of a barge which is heavily reinforced to take the pressure of pushing is called the（）.