Clove hitch

Canonical Name:clove hitch.
Variant Names: None.
[completed picture]
Category: binding
Origin: Ancient.
Related knots: to other knots
Releasing: Non-jamming.when tension is removed it is easy to undo the knot.
Efficiency: 70%.
Caveat: Requires a load in each direction. The clove hitch should not be relied on with rope that is thin or very slippery.
Uses: Securing objects. Such as tying a load on a trailer or truck as a means of reliably securing one end of the rope, especially when used in combination with a sheepshank to ensure tension is maintained. It is one of the knots used in climbing to secure the climber to a climbing anchor[?] at the belay station[?] (it has other climbing uses as well).
Comments: Can be pre-formed in the middle of the rope, then slid over the end of a post.
Structure: Formed from two half hitches around a rail or post where one is reversed or opposed to the other. This opposition causes the knot to grip against itself when tension is applied.
Tying: article/pictures