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[单选题]

In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.

A . insure that the hawser leads directly aft as it passes over the stern of the towing vessel

B . increase the stability of the towing vessel by raising the hawser off the deck

C . reduce chafing of the towing hawser

D . prevent fouling of the hawser on deck gear located on the stern of the towing vessel

参考答案与解析：

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