What is the term used to describe the distance needed for one strand to wrap 360 degrees around the core?

The term that describes the distance required for one strand to wrap 360 degrees around the core is known as one lay. This term is integral in rigging and rope construction, as it refers to the length of a complete helix formed by the strands around a central axis. It's particularly relevant in understanding how rope or cable is constructed and its behavior under load.

In contrast, the other options represent different concepts. "One full revolution" typically indicates a complete rotation around a point or axis but does not specifically apply to rope construction. "One turn" may imply a rotation of the rope but lacks the precise contextuality of how it involves the strand and core interaction. "One twist" generally involves a change in the direction of the strands but doesn’t encapsulate the complete measurement around the core as accurately as "one lay" does. Understanding this terminology is crucial for safe and effective rigging practices.