Page 202 - Bob Holtzman "The Field Guide to Knots How to Identify.."

14. Stevedore Knot

Also known as: Stevedore’s Knot

Before cargo was shipped in containers, stevedores unloaded ships with a
block and tackle. If the end of a rope slipped through a pulley block,
precious time was lost and cargo could come crashing down—hence the
need for an effective stopper knot. The Stevedore Knot will stop a hole
larger than a Figure 8 Knot but not as large as a Sink Stopper Knot.

Uses: stopper
Pros: large; easy to untie

Cons: smaller than a Sink Stopper

Instructions

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