Page 24 - D. Raleigh "Knots and ropes for climbers"

Double Bowline with Jack's Variation, using a Double Fisherman's to secure the tail.

Bowline on a Coil

Another old nautical knot, the Bowline on a Coil, was, I suspect, the keel-haul knot of choice.
Climbers will find it equally gruesome. This knot, used as an emergency harness, can choke you if you
hang in it for long. Still, it's a valuable knot, just in case. Four wraps around the waist is the norm, but
if rope is short, two or three wraps work almost as well. As with all tie-in knots, secure the Bowline on
a Coil with a Double Fisherman's, tied around the waist loops. If you need to hang on the rope for
long, make one of your initial waist wraps loose, and slip it under your butt to form a seat that will take
some of the load off your waist. Watch that you tie this knot correctly; done wrongwith out locking off
all the waist loop sit can become a slip noose and kill you.

Common Use
None

Secondary Use
Improvised harness