Simple Simon under

Knot used to join two ropes

Simple Simon Under

Category	Bend
Efficiency	high
Origin	Harry Asher, published in 1989
Related	simple Simon over bend, simple Simon symmetric bend, simple Simon double bend
Releasing	Fair
Typical use	suitable for dissimilar ropes, works well with synthetic ropes.

The simple Simon under bend is a knot belonging to the category bend. It was invented by Harry Asher. It is more secure than the similar Simple Simon over and more effective with quite large differences in thickness of the two ropes.^[1]

The simple Simon under holds well even with different sized ropes, or slippery synthetic ropes.^[2]

Comparison of Sheet bend, Simple Simon over and Simple Simon under

The Sheet bend was the starting point of developing the Simple Simon over bend.^[3]
Simple Simon Over.
The working part passes over the standing (loaded) part of the rope.
Simple Simon Under.
The working part passes under the standing (loaded) part of the rope.

Instructions

Tie as shown in the images. Note, that , as in the sheet bend, the two running ends should emerge on the same side of the knot. ^[4]

Form a bight with the left rope.
Pass the right rope down through the bight.
Go underneath of the working end over the bight.
Pass underneath the bight.
The working part passes beneath the standing (loaded) part of the right,^[5] you got an X.
Bring your working end down up through the bight
Tighten the bend.

References

^ Harry Asher, Alternative Knot Book, Sheridan House (August 1989).
^ Geoffrey Budworth, The Ultimate Encyclopedia of Knots & Ropework (Anness Publishing Ltd., 1999, 2007), 73.
^ Asher, Harry. (1989). The alternative knot book. Sheridan House. ISBN 0911378-95-2.
^ Asher, Harry. (1989). The alternative knot book. Sheridan House. ISBN 0911378-95-2.
^ Asher, Harry. (1989). The alternative knot book. Nautical. ISBN 0713659505. OCLC 19774858.

Knots

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By type

Bends	Adjustable Albright special Ashley's Alpine butterfly Basket weave Beer Blood Carrick Double fisherman's Fisherman's Flemish Grief Halyard Harness Heaving line Hunter's Nail One-sided overhand Racking Sheet Shoelace Shroud Simple Simon under Single carrick Surgeon's Surgeon's loop Triple fisherman's True lover's Water Zeppelin
Binding	Boa Bottle sling Constrictor Corned beef Granny Ground-line hitch Jamming Miller's Packer's Reef Strangle Thief Transom
Climbing	Autoblock Bachmann Beer Bowline on a bight Alpine butterfly Directional figure eight Double bowline Farmer's loop Figure-eight Figure-eight loop Figure-of-nine loop Friction hitch Klemheist Munter hitch Noose Overhand loop Prusik Trident loop Yosemite bowline
Coils & shanks	Chain sinnet Sheepshank
Decorative	Carrick mat Chinese button Celtic button Diamond Fiador Friendship Ghiordes & Senneh Matthew Walker Turk's head Wall and crown (triple crown knot)
Fishing (angling)	Angler's loop Arbor Bimini twist Blood Fisherman's Improved clinch Knotless Nail Palomar Snell Trilene Triple fisherman's Turle Uni
Hitches	Adjustable grip Anchor bend Axle Bachmann Bale sling Barrel Becket Blackwall Blake's Boom Buntline Cat's paw Clove Cow Distel Double overhand noose Falconer's Farrimond friction Friction hitch Garda Ground-line Half Halter Highpoint Highwayman's Hitching tie Icicle Improved clinch Killick Knute Lobster buoy Marlinespike Munter Ossel Pile Pipe Sailor's Snuggle Swing Taut-line Timber Trucker's Tumble
Loop	Angler's Artillery loop Bale sling hitch Bowline Bumper Carrick bend loop Cossack Cowboy bowline Diamond Double bowline Dropper loop Eskimo bowline Fiador Fireman's chair Friendship knot Halter hitch Handcuff Honda Jury mast Overhand Portuguese bowline Rigid double splayed loop in the bight Slippery eight Span Spanish bowline Tom fool's Trident Triple bowline Water bowline Yosemite bowline Zeppelin
Running (slip)	Hangman's Running bowline Running highwayman's hitch Tarbuck
Splices & splicing	Eye Fid Marlinspike Rat-tail T Western Union
Stopper	Ashley's stopper Button Double overhand Monkey's fist Overhand Stevedore
Whipping	Common Overhand knot with draw-loop Portuguese Sailmaker's West Country

Lists of knots
Related topics

Lists of knots	Bends Bindings Decorative knots Hitches (friction) Mathematical
Related topics	Chinese knotting Density History International Guild of Knot Tyers Macramé Mizuhiki Norigae Ropework Lashing Splicing Seizing Sennit