Eskimo bowline

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Eskimo bowline
Names	Eskimo bowline, Sitka loop, anti-bowline, Cossack knot, Kalmyk loop
Category	Loop
Origin	Ancient
Related	bowline, sheet bend, double bowline, water bowline, spanish bowline, triple bowline, bowline on a bight, running bowline, poldo tackle, cowboy bowline
Releasing	Non-jamming
Typical use	Placing a loop which will be stretched wide open under load in the end of a rope

The Eskimo bowline, reverse bowline, or 'anti-bowline' is in a class of knots known as 'eye knots' (some prefer to use the term 'loop knots'). The eye is formed in the end of the rope to permit attachments/connections. The simple (ABoK #1010) bowline is also an 'eye knot'. In the simple bowline, the collar component forms around the 'standing part'. In contrast, the collar component of an anti-bowline forms around the outgoing eye-leg.

Eskimo bowline based on the method described by Geoffrey Budworth in The Illustrated Encyclopedia of Knots.^[1] The tightened knot on the right takes on a trefoil crown shape.

The Eskimo bowline is best used in applications where the eye will be subject to a transverse loading profile (aka ring loading). In loading profiles where the eye is axially loaded in alignment with the SPart (Standing Part), a bowline is preferred. NOTE: In a transverse loading profile, the SPart is isolated from load.

The structure of the knot was not identified by Clifford Ashley (in 1944). All of the maneuvers to tie this knot are generally in the opposite (or 'anti' direction) relative to the bowline.

Dan Lehman^[who?] regards the general, bowline-like structure as an 'anti-bowline' in the sense that tying maneuvers are performed in a general 'anti' direction relative to the simple #1010 Bowline. After forming the 'nipping loop' (which can be formed as 'S' or 'Z' chirality) the working end is fed through that loop from the same side as the outgoing eye leg. This is opposite (or 'anti') direction relative to the simple (#1010) Bowline. When the eye of this knot is loaded in a transverse direction, the knot effectively mimics a sheet bend. (The image above with red rope would result in an ends-opposite (and inferior) sheet bend; the version shown on the right side would give a same-side sheet bend (ABoK #1431). When the eye of a simple Bowline is subject to a transverse loading profile, it mimics the inferior version of the Lapp bend, and so can slip and untie; the wrongly demeaned "left-handed"/"cowboy" bowline becomes the proper Lapp bend, and should hold.)^{[citation needed]}. Note: Some knot theorists use the term 'ring loading' in lieu of transverse loading.

Sheet bend

The so called 'Eskimo' Bowline has also been known as a 'Boas Bowline' and a Cossack knot - all of these names referring to the same structure. A slipped version of this knot is called Kalmyk loop.^[2][3] Interestingly, anti Bowlines can be made 'TIB' (Tiable In the Bight) by slipping the tail. However, it will not be 'EEL' (Either End Loadable).

See also[]

• Eskimo yo-yo

References[]

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