What is the Fisherman's Loop?
The Fisherman's Loop is an excellent rope termination knot for climbing lines and lanyards.
The Fisherman's Loop, what is it used for?
The Fisherman's Loop is mostly used in climbing.
Remarks
The knot is difficult to untie after being loaded, and should therefore only be used with carabiners. With a carabiner, you can reposition the knot towards the gate opening, and remove the carabiner from the knot, to make it easier to untie the Fisherman's Loop.
Alternatives for the Fisherman's Loop
Anchor Hitch