Boat size recommendations are for boats of average windage and proportions in 30 knots of wind, average bottom conditions, and moderate protection from open seas. Remember that the loads in 42 knots of wind are twice as much as in 30 knots.

Use three-strand nylon line, 6-12 ft (2-4 m) of chain and a minimum of 5:1 scope. A minimum of 6 ft (2 m) of chain should be used for every 25 ft (8 m) of water that you usually anchor in. For storm conditions use an anchor one or two sizes larger.