Page 76 - Geoffrey Budworth, Jason Dalton "The Little Book of Incredibly Useful Knots"

Double bowline

When there is danger of a simple bowline knot coming untied due to abrasion or motion of the

knot, then a double bowline is more secure.

Begin by forming two loops in the working end of the line, leaving enough working end to
complete the rest of the knot. Each loop should be made with the standing line emerging from
underneath, and the second loop should lie on top of the first without being twisted or flipped in

any way (1). Feed the working end up through the loops from the bottom. Pass it behind the
standing line, then feed it back down through the loops so that the end is within the large loop (2).
Pull on the working ends to tighten. For extra security, the knot can be backed up by first passing
the remaining working end around the adjacent part of the large loop (3), then feeding it down
through the loop just created, to form an overhand around that section (4).