Page 53 - Patrick Moreau, Jean-Benoit Heron Marine Knots How to Tie 40 Essential Knots

1 and 2 - The first movement is to make a half knot, like before.
The working end passes over, then twice under the right bight, so that it creates a bight twice-
under that just needs to be pulled up, like with the half knot.
Tied like this, it can only be used as a temporary stop.
It gets much more interesting when tied around a support (see the noose knot).