How much chain to let out as a function of wind strength

Chain and anchor parameters:

Size of chain     Weight             Length of chain     Allowable angle of chain at anchor
kg/m metres °   (Suggest Rocna 5°, CQR 0°)

Boat parameters: forces in daN, wind in Beaufort scale

Type of boat LOA in meters     Force 4     Force 6     Force 8     Force 10