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
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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 -
单项选择题
An intermediate spring is（）.
A.Fitted in each leg of the towing bridle
B.Generally located between the “fishplate” and the main towing hawser
C.Secured at the “H” bitts
D.Usually made of manila hawser
