Page 194 - Bob Holtzman "The Field Guide to Knots How to Identify.."

13. Sink Stopper Knot

This stopper knot is larger than Overhand or Figure 8 Knots and will stop a

rope through a significantly larger hole, but it’s shorter and less obtrusive
than the Stopper Knot.

Uses: stopper, especially in thinner rope

Pros: stops holes larger than many other stopper knots

Cons: very difficult to untie if tightened hard

Instructions

1. Make a counterclockwise overhand crossing turn. Form a bight in the standing part.

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