Double bowline

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A double bowline (or round turn bowline) is a type of loop knot. Instead of the single turn of the regular bowline, the double bowline uses a round turn. This forms a more secure loop than a standard bowline.<ref name="Ashley book of knots by Ashley">Template:Cite book</ref>

Naming

Though called "double bowline" by Clifford Ashley, this name is also reasonably descriptive of a different knot: the bowline on a bight. Because of this ambiguity some sources differentiate by using one of the alternate names above. And at least one other source uses the name "double bowline" for a mid-line loop knot made by tying a basic bowline with a bight of rope instead of the end.<ref name="Mountaineering edited by Cox and Fulsaas">Template:Cite book</ref>

Tying

First, learn to tie the bowline by laying the working end on the standing part and twisting to form a loop (the "hole" that the rabbit comes out of). Wrap the loop once more around the working end. Then pass the working end behind the standing part and back down through the double loop.

Uses

The double bowline is one of the typical tie-in knots used in climbing, along with the figure eight follow through<ref name="Rock Climbing by Luebben">Template:Cite book</ref><ref name="Knack Rock Climbing by Green, Spencer-Green, and Doolittle">Template:Cite book</ref> and the Yosemite bowline.<ref>Template:Cite book</ref> The advantage of the double bowline over the figure 8 is that it is easier to untie after being weighted in a fall,<ref name="Rock Climbing by Luebben" /><ref name="Knack Rock Climbing by Green, Spencer-Green, and Doolittle" /> and so is used by sport climbers who take multiple lead falls and then have trouble untying their figure eights.<ref name="Rock Climbing by Luebben" /><ref name="Knack Rock Climbing by Green, Spencer-Green, and Doolittle" /> The disadvantages of the double bowline are that it is less secure than a figure eight knot, takes longer to tie, and is not as easy to check.<ref name="Rock Climbing by Luebben" /><ref name="Knack Rock Climbing by Green, Spencer-Green, and Doolittle" /> Unlike the figure eight, there are many variations of the bowline, with ambiguous names, and some are not safe for climbing.<ref name=":0">Template:Cite book</ref><ref name=":1">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>Template:Cite book</ref><ref>Template:Cite book</ref>

The Bowline on a bight, when re-threaded instead of being tied on a bight, can also be used for tying into a climbing harness and provides more strength and security than the double bowline.

See also

• List of knots

External links

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• Double Bowline at Notable Knot Index.