Page 71 - Buck Tilton - Outward Bound Ropes, Knots, and Hitches 2 ed.

The most notorious sliding loop of all time, the hangman’s

knot, or noose, is able to support very heavy weights and
the hard jerk when a large load is suddenly applied. Even
with heavy use, the noose unties—but not always with great

ease. It does not actually slide with great ease either, and
the more turns of the rope around itself during tying, the

less easily it slides.

Hangman’s Knot: Step 1

Form two bights in the working end of the rope,
as shown in the photograph.

Hangman’s Knot: Step 2