Courtney the Dancer
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Thanked 26 Times in 25 Posts
Rep Power: 16
Re: Forces on a dockline while docking....
40+' sailboat, full throttle in forward, 40 knot tailwind, one line coming tight on a cleat = something is going to give. Unless it's a perfectly straight, unobstructed path from the deck to the dock cleat there's going to be a chafe/break spot, and unless both ends are spliced eyes any knot is going to reduce the breaking strength of the line by about 50%. I suspect that the skipper was allowing the line to slip around the winch to avoid the shock load.
SV Laurie Anne
1988 Brewer 40 Pilothouse