單項選擇題In admiralty sailing directions, stripes is the word used to indicate()marking.

A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal


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1.單項選擇題In anchoring orders, up and down means().

A.the chain is not upright
B.the chain is tight
C.the chain is upright
D.the chain is slack

2.單項選擇題In anchoring orders, walk back the chain means().

A.pay away the chain
B.take in the chain
C.check up the chain
D.take a strain on the chain