Double fisherman's knot
|Double Fisherman's knot|
|Names||Double Fisherman's knot, Grapevine|
|Related||Fisherman's knot, Triple fisherman's knot, Double overhand knot, Strangle knot|
|Typical use||Joining thin, stiff or slippery lines|
|Caveat||Difficult or impossible to untie|
Use the double fisherman's knot to tie together two ropes of unequal sizes. This knot and the triple fisherman's knot are the variations used most often in rock climbing, but other uses include search and rescue.