Page 51 - Patrick Moreau, Jean-Benoit Heron Marine Knots How to Tie 40 Essential Knots

4 and 5 - The braiding continues, always alternating over then under, to create the three-level braid.
If desired, you can continue by creating a bight twice-over followed by a bight twice-under.

6 - Now that the preparation is finished, we can use it.
The working end is led over the bight twice-over and under the one that is twice under.
This braid ensures that it will hold.
When there is no longer any tension on the knot, after taking in the sails, it can be easily untied.