ABOK #532, #1053
Animated Knots
Troop Resources
The Alpine Butterfly Loop provides a secure loop in the middle of a piece of rope. Load can be safely applied: from the loop to either end of the rope; between the two ends with the loop hanging free; or to the loop with the load spread between the two ends.
In Scout Pioneering, we frequently use a butterfly knot to form the fixed loop in a rope tackle. it is a favored knot for mountain/rock climbers, used for hand or foot loops or used to hook their carabiners into.