The Prussik Knot
The Prussik knot is the best known of a family of knots that are used to attach a moving "clamp" to another rope. This clamp may be used to either ascend the rope or provide a form of backup when abseiling. Easy to form, it has been superceded in recent years by its more advanced cousins.
|Ease of Tying||Very easy to tie.|
|Recognisable||Very good in this respect.|
|Also known as||None known.|
|Usage||Security whilst abseiling. Ascending ropes. The Prusik (and its variations) are the only method that permits the ascending of double or twin ropes, all mechanical devices work on single ropes.|
|Advantages||Simple, easily understood.|
|Disadvantages||Can jam under load. Cannot be moved whilst under load.|