The Towboat Hitch or Capstan Hitch is a great knot or hitch to use when you need to tie a line to your winch or a post. The Towboat Hitch or Capstan Hitch is quick and easy to tie, very secure, and can be released under load.
The Towboat / Capstan Hitch is great when you need to tie to a piling or similar object.
Winches on sailboats are usually very solidly mounted because of the high sheet loads, this makes them a nice attachment point when towing another boat, winches are also usually easier to reach than cleats.
The Towboat / Capstan Hitch is a well kept secret, I have demoed this for people who have sailed all their life and the look on their face is one of amazement.
I have updated the instructions with better pictures and instructions.
Practice this one a few times and amaze your friends and fellow boaters.