Double bowline a climbing harness and provides more strength and security than the double bowline. Double bowline 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. 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
USS Tom Bowline (1814) — only to be driven off by a gale. "Hornet" arrived five days later, but her landfall coincided with the appearance in the area of British brig-sloop . The two ships closed for action, and "Hornet" damaged "Penguin" seriously enough to warrant destruction of the Briton. The sighting of strange sail on the horizon hastened "Hornet's" burning of the prize, but apprehension turned to relief as the sails proved to be "Peacock" and "Tom Bowline" returning to Tristan da Cunha for the planned rendezvous. "Tom Bowline" embarked the "Penguin's" captive crew and took the prisoners to Rio de Janeiro, Brazil.