Chock

A chock is a deck or bulwark fitting that guides a mooring, towing or anchor line as it leads inboard or outboard. It is usually a smooth, strong metal or composite fairlead shaped as an open U, closed ring or roller fitting, designed to keep the line correctly aligned and reduce chafe under load.

Proper chock placement keeps loads fair to a Cleat, bollard or windlass and prevents a Rope from sawing across gelcoat, toe rails or stanchions. In docking, rafting, anchoring or Towing, a correctly sized chock helps control lead angles and reduces shock loads when surge, wash or swell moves the boat.

Before relying on a chock, inspect fastenings, backing plates and bearing surfaces for corrosion, cracking or sharp edges. Forecast wind, swell and Sea State with PredictWind before choosing mooring arrangements, especially in exposed marinas or anchorages where shifting loads can quickly turn minor chafe into line failure.