The taut-line hitch is an adjustable loop knot for use on lines under tension. It is useful when the length of a line will need to be periodically adjusted in order to maintain tension. It is made by tying a rolling hitch around the standing part after passing around an anchor object. Tension is maintained by sliding the hitch to adjust size of the loop, thus changing the effective length of the standing part without retying the knot. It is typically used for securing tent lines in outdoor activities involving camping, by arborists when climbing trees, for tying down aircraft, for creating adjustable moorings in tidal areas, and to secure loads on vehicles.
ABoK #62, #1027, #1230, #1729, #1730, #1799, #1800, #1855, #1856, #1857, #1993
Turn the running end around the object from the front.
Pass over the standing part, then under it and through the loop.
Pass under the standing part and through the loop, then pass under the standing part, then over it and through the loop to make a half hitch.
Tighten the knot.
The Tau-line hitch is complete!