February 2012

Mastering marlinespike

Constrictor knot

The easy-to-cast constrictor knot is frequently used as a secure binding for closing a sack or to fasten a line to another line for in-line pulling (D.).

Difficult to untie, the constrictor knot should be used where you desire a permanent knot. In practice, the ends are frequently heat-melted so the knot cannot be untied.

Constrictor knot

A. To apply the knot, take a turn around the objects to be tied, pass the bitter end over the working part, and take another turn around the objects to the left of the working part. As the arrow shows, bring the bitter end over the working part and up under the bottom and top parts of the first turn.

B. Pull tightly on the bitter end and working part to cinch the knot.

C. & D. To provide for a parallel pull on the working part, add a half hitch with the bitter end as shown. To improve pulling ability still more, add as many consecutive half hitches as required to prevent slipping.

Original materials used with thanks to Irene Rodriguez and John Bennett

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Mastering Marlinespike


Cleat hitch

Round turn with two half hitches

Clove hitch

Sheet bend

Figure eight

Anchor bend

Rolling hitch

Double sheet bend

Eye splice

Becket bend

Reef knot

Blood knot

True lover’s knot

Monkey’s fist

Carrick bend

Angler’s loop

Strangle knot

Jar sling

Japanese success knot

Spanish bowline

Stevedore knot

Heaving line knot

Three-part crown knot

Sack knot

Short splice

Constrictor knot

Slip knot

Japanese bowline

Hawser bend

Slipped bowline

Bowline on a bight

Lark’s head

Buntline hitch

Jury mast knot

Slipped buntline hitch

Painter’s bowline

Binder’s loop

Wall and crown knot

Inside cow hitch

Toggled reef knot

Long splice

Tugboat hitch

Crown sennit

Toggled lark’s head

Matthew Walker knot


Back splice


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