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The double fisherman's knot or grapevine knot is a bend. This knot and the triple fisherman's knot are the variations used most often in climbing , arboriculture , and search and rescue . The knot is formed by tying a double overhand knot , in its strangle knot form, with each end around the opposite line's standing part.
The knot was first introduced by the Victorian chief fire officer Eyre Massey-Shaw in 1876. [2] Made with suitable rope by qualified personnel this knot can be used as a rescue harness capable of supporting a person while being hoisted or lowered to safety. One loop supports the body, around the chest and under the arms, and the other loop ...
The reef knot can capsize if one of its standing ends is pulled.. A knot that has capsized or spilled has deformed into a different structure. Although capsizing is sometimes the result of incorrect tying or misuse, it can also be done purposefully in certain cases to strengthen the knot (see the carrick bend [4]) or to untie a seized knot which would otherwise be difficult to release (see ...
The result is slightly larger and more difficult to untie. It forms the first part of the surgeon's knot and both sides of a double fisherman's knot. According to The Ashley Book of Knots, "A double overhand knot tied in a cat-o'-nine-tails is termed a blood knot." [4] When weighted, it can be difficult to untie, especially when wet. [5] [6]
The knot balances the load between the two halves of the hitch, and is used in wharfs and docks. If one half fails, the other should hold [how?] until the load can be safely and swiftly lowered to the ground [citation needed]. When the sling is long the knot can be pre-formed in anywhere in it, then slid over the end of a hook or post.
The Knot Bible: The Complete Guide to Knots and Their Uses, page 143. A & C Black. ISBN 9781408155875. Budworth, Geoffrey (2012). The Knot Book Hachette UK. ISBN 9780716023159. Finazzo, Scott (2016). Prepper's Guide to Knots: The 100 Most Useful Tying Techniques for Surviving any Disaster, page 117, Ulysses Press. ISBN 9781612436302.
The security of the knot arises from the fact that at step 3 in the tying sequence the knot is a Double Harness Bend (ABoK #1420). The additional step of passing the ends through the outer loops to complete the knot results in each line entering and exiting the knot being clamped at two points within the knot.
The surgeon's knot is a surgical knot and is a simple modification to the reef knot. It adds an extra twist when tying the first throw, forming a double overhand knot . The additional turn provides more friction and can reduce loosening while the second half of the knot is tied. [ 1 ]