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單項選擇題

A face line is used to（）.

A.prevent barge movement in a lock
B.secure two barges end-to-end
C.secure barges to the towboat
D.secure barges side-by-side

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單項選擇題

A drift lead indicates that the vessel is dragging anchor when the line is（）.

A.taut and leading forward
B.slack
C.leading out perpendicular to the centerline
D.leading under the hull

單項選擇題

A deepwell pump is a type of（）.

A.screw pump
B.centrifugal pump
C.eductor
D.gear pump