This will show you how to tie a Jury Knot. Used at the mast head to "jury rig" a sailboat. The mast goes into the center of the knot, stays are run from the three loops and the two standing ends are run to the deck as a back stay. As tension is applies to the stays, the knot grips the mast tighter and tighter. This knot can be used in sailing, boating, general use, camping and bondage.