Girth Hitch
The "Girth Hitch" is used in Canyoneering, again as a way to tie a knot to an object. Most of the applications I have seen this used is when canyoneers use a P.A.S (Personal Anchor System) to tie it to their harness.
The reason why you would use this one, is that is is incredible easy to tie and it saves the person from using a carabiner on one side. The other side will need a carabiner so that it can clip into things. Especially when used in "fall protection" scenarios.
This is isn't used for rappelling but rather to attach a rope to an object.
The Girth Hitch is also how you form part of the Prussik knot.
Pros:
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Easy to tie/untie
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Easy to memorize
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Can be tied with one hand
Cons:
Caution:
Canyoneering Usage Examples:
Additional Resources:
Below, I show you three ways on how to tie the knot, via:
1) Pictures
2) GIF (animated picture that repeats itself with no-end)
3) Video (from Canyoneering101 YouTube Channel)
How to tie (pictures):
1st Step:

2nd Step:

3rd Step:

4th Step:

5th Step:

6th Step:

