The cowboy bowline[2] or left-hand bowline,[1] is a variation of the bowline loop knot.
The cowboy bowline has the working end go around the standing part on the side closer to the loop and results with the working end outside the loop. In contrast, a regular bowline has the working end finishing inside the loop. (The "rabbit" goes around the "tree" in the opposite direction from normal.) The Ashley Book of Knots states that it is "distinctly inferior" to the standard bowline[1] because of its similarity to the left-hand sheet bend.[3] Various tests of the different versions' strengths show little difference;[4] conjecture about either knot's vulnerability to some failure remain pretty much only that – conjectures. However, the left-hand bowline is much more stable under ring loading, as it then acts effectively as a proper Lapp bend, while the simple bowline acts as the inferior version of the Lapp bend, which tends to slip.
As for the tail of a regular bowline finishing "inside the loop [eye]", that is more a formal-image state than one of an actual knot, as the draw of the standing part will pull the tail around so that it actually points away from the eye, but there are various ways the knot can be dressed to affect this aspect.
Some hearsay suggest the Dutch Navy uses (or used) this variant of the bowline because they consider it superior since the working end is not so easily pushed back by accident.[citation needed] However, there is no documentation to confirm this claim, and some Dutch knot tyers outright deny it.
Another piece of unverified lore is that it is called a winter bowline because the exposed working end on the outside would blow in the wind and prevent it from freezing to the loop on ships in the north Atlantic during winter. (This suggests that the standard bowline would be the summer bowline.)
^ abcClifford W. Ashley, The Ashley Book of Knots (New York: Doubleday, 1944), p.188 #1034½.
^ abSoles, Clyde (2004). The Outdoor Knots Book. The Mountaineers Books. p. 98. ISBN 978-0-89886-962-0.
^Clifford W. Ashley, The Ashley Book of Knots (New York: Doubleday, 1944), 16.
^Cite error: The named reference :0 was invoked but never defined (see the help page).
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