Covers the design of windlass wildcats to ensure proper fit and function between wildcat and mooring chain. Wildcats are the five-whlep type for use with studlink anchor chain conforming to the classification society grades 1,2 and 3 ORQ and Grade 4 chain. WIldcat dimensions are provided for chains in integral 1/8 in. (3 mm) steps, ranging in size from 2 in. to 4 in. (51 mm to 102 mm). WIldcat dimensions for chain in intermediate 1/16 in. (1.5 mm) steps are not provided, but wildcats in these sizes are premitted within the scope of this publication.