The Stevedore knot is a stopper knot, often tied near the end of a rope.
Used as a stopper knot.
Many sources suggest the knot was used by stevedores in their work loading and
unloading ships. To raise and lower cargo they used large blocks and these required a larger stopper knot to prevent
the line from running completely through the block.
The Stevedore Knot remains secure even when slack.
Stevedore knot, Double figure eight.
The knot is formed by following the steps to make a figure-of-eight knot, but the working end makes an additional
wrap around the standing part before passing back through the initial loop in the same direction it would have for
a figure-of-eight knot.