Page 36 - Patrick Moreau - Marine Knots How to Tie 40 Essential Knots

This knot consists of two wrapped half hitches.
It is an extremely simple and handy knot, making it one of the most popular.
However, if there is a lot of tension on the rope, it may get stuck and be
impossible to untie.

1 - Using a vertical support with an accessible top, the working end passes under the standing end.