Page 50 - Patrick Moreau-Marine "Knots How to Tie 40 Essential Knots"

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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).