In towing，heaving lines are used for（）.<br>A:passing a tow bridle to the tug<br>B:passing a messenger line<br>C:heaving in the tow bridle<br>D:service lines with rocket line throwers

In towing，heaving lines are used for（）.
A:passing a tow bridle to the tug
B:passing a messenger line
C:heaving in the tow bridle
D:service lines with rocket line throwers

出自：海船船员证

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