Popularised by Joe DeBeer, South Africa. Named after his son.
1. Make one short limb (the post) and one long limb (the loop).
2 & 3. Make an overhand throw with the loop strand over the post.
4 & 5. Make another overhand throw with the loop over the post.
6. Bring the loop strand over the loop.
7. Pass the loop strand over... 8. ...and under the post.
9. Tighten the knot.
10. By pulling on the post the knot will slide forward. A knot pusher can be used on the post.
11 & 12. Secure the knot with alternating half hitches.