单项选择题

It is sometimes necessary to moor bow and stern to two mooring buoys in order to（）.

A.avoid any swing in a restricted space
B.shelter the ship from strong winds
C.prevent from touching with other vessels
D.make a convenience of cargo discharging

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单项选择题

Installing tandem anchors on the same mooring line is referred to as（）.

A.doubling
B.pretensioning
C.piggybacking
D.paralleling

单项选择题

In a crossing situation，a vessel fishing must keep out of the way of a vessel which is（）.

A.under sail
B.towing
C.restricted in her ability to maneuver
D.engaged in pilotage duty