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((refimprove|date=April 2016))
[[Image:Bight.jpg|thumb|An open loop of rope. Sources differ on whether this is a bight.]]

In [[knot tying]], a '''bight''' is a curved section or slack part between the two ends of a [[rope]], [[Twine|string]], or [[yarn]].<ref name="ashley597">((harvp|Ashley|1944|p=59)). "Any slack part of a rope between the two ends, particularly when curved or looped."</ref>  A knot that can be tied using only the bight of a rope, without access to the ends, is described as '''in the bight'''.  The term "bight" is also used in a more specific way when describing [[Turk's head knot]]s, indicating how many repetitions of [[braid]]ing are made in the circuit of a given knot.<ref name="ashley232">((harvp|Ashley|1944|p=232))</ref>

==Bight vs. open loop==
Sources differ on whether an open [[Loop (knot)|loop]] or U-shaped curve in a rope qualifies as a bight.  ((harvtxt|Ashley|1944)) treats bights and loops as distinct, stating that a curve "no narrower than a semicircle" is a bight,<ref>((harvp|Ashley|1944|p=13, #30))</ref> while an open loop is a curve "narrower than a bight but with separated ends".<ref>((harvp|Ashley|1944|p=13, #31))</ref>  However, ''The Illustrated Encyclopedia of Knots'' (2002) states: "Any section of line that is bent into a U-shape is a bight."<ref>((harvp|Budworth|2002|p=18))</ref>

==Slipped knot==
<!-- [[Slipped knot]] redirects here -->
((distinguish|slip knot))
In order to make a '''slipped knot''' (also '''slipped loop''' and '''quick release knot'''),  a bight must be passed, rather than the end.  This '''slipped''' form of the knot is more easily untied.  The traditional [[Bow (knot)|bow knot]] used for tying [[shoelace]]s is simply a [[reef knot]] with the final [[overhand knot]] made with two bights instead of the ends.  Similarly, a [[slippery hitch]] is a slipped [[clove hitch]].((fact|date=April 2016))

==''In the bight''==
The phrase '''in the bight''' (or '''on a bight''') means a bight of line is itself being used to make a knot.  Specifically this means that the knot can be formed without access to the ends of the rope.<ref name="ashley207">((harvp|Ashley|1944|p=207))</ref>  This can be an important property for knots to be used in situations where the ends of the rope are inaccessible, such as forming a fixed loop in the middle of a long [[climbing]] rope.((fact|date=April 2016))

Many knots normally tied with an end also have a form which is tied in the bight (for example, the [[bowline]] and the [[bowline on a bight]]).  In other cases, a knot being tied in the bight is a matter of the method of tying rather than a difference in the completed form of the knot.  For example, the [[clove hitch]] can be made "in the bight" if it is being slipped over the end of a post but not if being cast onto a closed ring, which requires access to an end of the rope.  Other knots, such as the [[overhand knot]], cannot be tied in the bight without changing their final form.((fact|date=April 2016))

==Examples==
((gallery
|title=Bight examples
|width=160 | height=170
|align=center
|File:Sheet-Bend-ABOK-1431.jpg|alt1=Sheet Bend|The blue rope (right) is [[Half hitch|half-hitched]] through and around a bight of the red rope (left) in this [[sheet bend]].
|File:Slipped-buntline-hitch-ABOK-1712.jpg|alt2=Slipped buntline hitch|The final tuck of this [[slipped buntline hitch]] is made with a bight rather than the end, making it easier to release after tightening.
|File:Marlinespike-hitch-ABOK-2030-Step3.jpg|alt3=Marlinespike hitch|In the tying of a [[marlinespike hitch]], a bight of the standing part is snagged through the loop.
|File:Turks-head-3-lead-10-bight-doubled.jpg|alt4=Turk's head 3 lead 10 bight doubled|The bights, in the case of this 3-lead 10-bight [[Turk's head knot]], are the scallops along the perimeter of the knot.
|File:Alpine butterfly loop.jpg|alt5=Alpine butterfly loop|The [[alpine butterfly knot]] is a climbing knot which is tied ''in&nbsp;the&nbsp;bight'' and forms a reliable fixed loop.
|File:BowlineBight.jpg|alt6=Bowline on a bight|The [[bowline on a bight]] forms two fixed loops in the middle of a rope.
|File:Overhand-loop-ABOK-1046.jpg|alt7=Overhand loop|An [[overhand knot]] tied ''in&nbsp;the&nbsp;bight'' results in an [[overhand loop]].
|File:FigureOfEightLoop.jpg|alt8=Figure eight loop|A [[figure-eight knot]] tied ''in&nbsp;the&nbsp;bight'' results in a [[figure-eight loop]].
))

==References==
((Reflist))

==Bibliography==
*((cite book |last=Ashley |first=Clifford W. |year=1944 |title=The Ashley Book of Knots |location=New York |publisher=Doubleday |isbn=9780385040259 ))
*((cite book |last=Budworth |first=Geoffrey |year=2002 |title=The Illustrated Encyclopedia of Knots |isbn=9781585746262 ))

==External links==

((Commons category|Bights))
((Knots))

[[Category:Knot components]]

[[fr:Nœud_(lien)#Ganses]]

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