Climbers often add a “backup knot” to their primary knot for additional security. The purpose of the backup knot is to avoid the primary knot from untying itself. This version is simply one side of a Double Fisherman's tied with a long tag end (fifteen to eighteen inches) of the primary knot.
Backup KnotTying Instructions
- Wrap the free end twice around the standing rope and the working part of the free end, working back toward the primary knot.
- Feed the free end back through the loops just made.
- Pull free end to tighten backup knot down onto standing line.