Learn how to tie a Draw or Thief Hitch - a means of securing a rope with two standing ends - one end is load bearing, and the other can be pulled to release the knot. I used this knot extensively for raising the mast on my first trailor-sailor - Tie this above the spreaders, stand the mast up, then pull on the release line to untie it without having to climb aloft. This knot can be used in sailing, boating, general use, camping and bondage.
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