Taut-line hitch

From WildernessWiki.org

Wrap line around subject, and then pass working end down through loop, wrapping it around standing part

Wrap working end around line once again, and tie a half hitch around standing part

Pull tight

The Taut-line Hitch is a useful hitch, designed to hold itself securely to a line when under pressure, yet slide easily when prompted. It is commonly used for tent guy-lines, dining flies, and in other situations which require fast, yet secure adjustment of length or tension. It is a relative of the Prusik Knot.

When force is applied to the standing end of the completed knot, it will not slide. If, however, one holds the knot directly, it can be easily moved up and down the line.

How to tie

1. Pass the working end around the pole or stake and over the standing part.
2. Bring the end under and through the loop formed, then wrap it around and through a second time.
3. Tie a half hitch further down the standing part and pull tight. The tension on the line can be adjusted by sliding the hitch up and down the rope.