Girls ... this is simple:
1. the OP has likely left the thread;
2. the answer I use is Sumio's Symmetric Sheet Knot (3SK), named after the famous Japanese cruiser and boatbuilder
, Oya Sumio san.
Sumio puzzled over the problem, not liking to use a bowline because it was asymmetric
, a little too bulky, and - when used on the clew of the jib
of a cutter
- too prone to getting hung up on the (inner) forestay.
Sumio kept working on the issue and trying variations on the bowline, and 'discovered' the 3SK. Sumio taught me the knot.
Few useable knots are 'new'. The 3SK is one of the family
of what once were called Capstan Knots.
Capstan knots are made in the middle of a long line, from the boat, around a capstan or cleat, and then back to a different position on the boat. I've known not a few skippers who use a long line as, say, both a forward spring and an aft spring, and so use a capstan knot (not necessarily the 3SK) around the one dock
Here're are (a) my clumsy attempt to use KnotMaker to diagram the 3SK; and (b) a diagram of the 3SK that I found in an old English
dictionary (William Dwight Whitney The Century Dictionary and Cyclopedia: An encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1889))
which used it as THE diagram representing the family
of Capstan Knots.