单项选择题
Flanking rudders effect a vessel’s heading because of the（）.
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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相关考题
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单项选择题
Cribbing is（）.
A.wooden blocks or dunnage placed between a deck load and the deck
B.the chains and shackles used to secure a deck cargo
C.a crate in which a deck cargo is packaged
D.cardboard separation pieces placed between deck loads to prevent chafing -
单项选择题
At least（）radar transponder shall be carried on each side of every cargo ship of 500 gross tonnage and upwards.
A.one
B.two
C.three
D.four -
单项选择题
As you hold a piece of manila line vertically in front of you，the strands run from the lower left to the upper right.Which type of line is this（）.
A.Right-hand laid
B.Cable-laid
C.Sennet-laid
D.Water-laid
