Alpine butterfly Loop

The Alpine Butterfly Loop is useful anytime a secure loop is required in the middle of a rope. A good example is when a line of hikers wish to hook on along the length of a shared rope or as a possible option for the first part of a Trucker’s Hitch. Also, if a length of rope is damaged, it is a wonderful way to isolate the damaged section so that the rope may still be used – far safer than The Sheep Shank.

https://www.animatedknots.com/alpine-butterfly-loop-knot