Page 250 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

22. Surgeon’s Knot with Second Tuck

Also known as: Doubled Surgeon’s Knot

This variation of the Surgeon’s Knot adds a second tuck to the top Half Knot
for extra security.

Uses: packages, bundles, slippery items

Pros: more secure than a regular Surgeon’s Knot; helpful when using slippery rope
Cons: more difficult to untie than a regular Surgeon’s Knot

Instructions

1. Start by tying a Surgeon’s Knot (opposite), but don’t pull it tight yet.

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