Towing & Ship-Assist · Bridle & Gear
A 'surge chain' or chain pennant is sometimes inserted in the towing rig because chain:
- AFloats better than wire
- BAdds weight low in the catenary to dampen surging and resists chafe at the connection✓ Correct
- CIs cheaper than synthetic line
- DConducts electricity to the barge
Explanation
A length of chain in the rig adds weight to deepen the catenary (improving shock absorption) and resists the chafe and cutting that would quickly damage wire or synthetic at the bridle apex and chock. Its weight also helps keep the lead down.
Authority: Towing seamanship; gear
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