Reef knot
The reef knot, or square knot, is an ancient and simple binding knot used to secure a rope or line around an object. It is sometimes also referred to as a Hercules knot. Wikipedia
ABoK: #74, #75, #460, #1204, #1402, #2096, #2573, #2574, #2577, #2580
Instructions: 1
Names: Reef knot, Square knot, Hercules knot, Double knot, brotherhood knot
Origin: Ancient
Typical use: Joining two ends of a single line to bind around an object