Edward L. Platt

Here's a fun knot I worked out. It's essentially two slipknots securing each other. It forms a secure, single loop, and can be quickly released by pulling on the working end. I'd be interested to know if anyone has seen it used or know if it has another name. Warning: I'm not endorsing this knot as being useful for any particular purpose, use at your own risk.

Tying Instructions

1. This is a knot, get some rope.
2. Tie a slipknot.
3. Form a single turn by passing the working end behind itself.
4. Pass the turn over the slipknot forming a large loop.
5. Pull a bight of the working end through the loop of the slipknot, creating the loop of a second slipknot.
6. Tighten the large loop to secure the knot. To prevent accidental release, pass the working end through the loop of the second slipknot.
7. To release, pull the working end back through the second slipknot and tug perpendicular to the standing part.

Update: Thanks to the friendly folks on the International Guild of Knot Tyers Forum, I've been able to identify this as a variant of the Mooring Hitch. The bight in the standing end is replaced by the loop of a slipknot, which fixes the position of the knot on the standing end, allowing it to function as a loop as well as a hitch.