單項(xiàng)選擇題

Logbooks are used to record the events occurring when（）.

A.the ship is in a harbor
B.the ship is at anchorage
C.the ship is underway
D.All of the above

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Manila lines in which the strands are right-hand laid（）.

A.should be coiled in a clockwise direction
B.should be coiled in a counterclockwise direction
C.may be coiled either clockwise or counterclockwise
D.should never be coiled

單項(xiàng)選擇題

Mariners are warned that fog signals should（）be relied upon implicity.

A.always
B.never
C.sonetimes
D.sometime