The Gypsy Windlass is a mechanical device used on ships to handle anchor chains. It features a rotating drum (gypsy) designed to grip and manipulate the chain links. This ensures secure anchoring and efficient deployment or retrieval of the anchor.

The Gypsy Windlass typically accommodates anchor chains with sizes ranging from 10mm to 25mm (3/8" to 1") in diameter. Common chain grades include Grade 30, Grade 40, and Grade 70 (G4), with higher grades offering greater tensile strength. Chain materials are usually high-tensile steel or galvanized steel for corrosion resistance. Buoyancy is negligible due to the chain's density, but buoyant markers may be attached. Viscosity is not applicable to chains, but lubrication may be required for smooth operation. The Gypsy Windlass itself is often made of cast steel or stainless steel, with a designed working load matching the chain grade and size.