Page 600 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

3. Pull down on the bight to complete a Slipped Overhand Knot. This provides purchase—a point where
mechanical advantage can be exerted, much like on a pulley.

Uses: tying gear to roof racks or trailers; securing tarps over stacked material

Pros: tight, secure, adjustable
Cons: uses a lot of rope; slip knot may be difficult to untie

Untying: Slide the Taut Line Hitch up to create slack, then undo the final

Half Hitch to free the working end and unravel the rest of it. Pull the

working end through the loop knot, remove it from the second tie-off point,
then pull it sharply to remove the loop from the Slipped Overhand Knot.

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