The net productivity per gang-hour can be improved through a decrease of（）.

The Master or person in charge of a ship shall ensure the crane record book shows the（）.

A.Date and description of each failure
B.Average load in pounds for each usage
C.Total number of lifts for each usage
D.All of the above

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The item（）is not the advantage of the hydraulic winch．

A.less jerky starts
B.less jerky stops
C.overheating worries
D.none of the overheating worries

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