The bowline on a bight is a knot which makes a pair of fixed-size loops in the middle of a rope.

It is one of the two tie-in knots that are being taught by the German Alpine Club (DAV), generally being considered secure.

[4] European cavers widely advocate the use of a figure eight twisted version of the bowline on a bight.

This knot is very popular in caving as it allows the load to be spread between two anchor points, reducing the stress placed on them and providing a backup should one fail.

Commonly known as the Y-hang it allows for a free-hang descent and can be easily adjusted to avoid waterfalls or rub points.