What is the purpose of a thimble in rigging?

• A. A protective ring placed inside a loop to prevent rope wear and deformity.
• B. A type of knot used to join lines.
• C. A device to measure rope tension.
• D. A protective cap at rope end.

Answer: (A)

Thimbles provide a smooth, protected bearing surface inside a rope loop, preventing wear and deformation where the rope contacts hardware. By sitting inside the eye, the rope bears against the inner, rounded edge of the thimble rather than cutting into itself or the hardware, which helps maintain the loop’s shape and extend rope life under load. It’s not a knot, it doesn’t measure tension, and it isn’t a cap at the rope end.