单项选择题
Tugs sometimes shackle a length of chain in the towline in order to（）.
A.take the wear should the towline drag bottom
B.assure that if the towline is overstressed it will part close to the bridle
C.prevent the towline from whipping should it part
D.put spring in the towline
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相关考题
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单项选择题
Towlines should be inspected for chafing where the towline（）.
A.passes over the stern of the towing vessel
B.passes through chocks
C.is attached to the disabled vessel
D.All of the above -
单项选择题
The strongest of the natural fibers is（）.
A.cotton
B.hemp
C.manila
D.sisal -
单项选择题
The spray of water in low-velocity fog will have（）.
A.greater range than high-velocity fog
B.lesser range than high-velocity fog
C.about the same range as high-velocity fog
D.greater range than a solid stream
