单项选择题

When underway and proceeding ahead，as the speed increases，the pivot point tends to（）.

A.move aft
B.move forward
C.move lower
D.remain stationary

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单项选择题

When towing in an open seaway，it is important to use a towing line（）.

A.made only of wire rope，due to possible weather conditions
B.that will have the tow on a crest while your vessel is in a trough
C.that will have the tow on a crest while your vessel is on a crest
D.with little dip to gain maximum control of the tow

单项选择题

When towing astern，increased catenary will（）.

A.increase control of the tow
B.prevent the towing vessel from going in irons
C.make the towing vessel less maneuverable
D.reduce shock stress on the towing hawser

单项选择题

When steering a tow downstream around the shape of a sand bar，and staying on the proper side of the buoys，an operator should be cautious of（）.

A.eddies under the bar
B.swift current under the bar causing loss of control
C.cross-currents pushing the tow away from the bar
D.cross-currents pushing the tow into the bar