单项选择题

A gypsy or gypsyhead is a（）.

A.punt used for painting over the side
B.small，reciprocating steam engine
C.spool-shaped drum fitted on a winch
D.swinging derrick

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单项选择题

A flounder plate，on a topping lift，is（）.

A.a fairlead block
B.a swivel pin for the topping lift block
C.a triangular steel plate with a hole at each corner
D.the lower block of a multiple part topping lift

单项选择题

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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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