The land version is to help observers who do not have properly sited anemometers to report the wind force. . . Sea For Use on Land 0 Calm Sea like a mirror Smoke rises vertically 1 Light air Ripples with the appearance of scales are formed, but without foam crests Direction of wind shown by smoke drift but not by wind vanes 2 Light breeze Small wavelets, still short but more pronounced. Crests have a glassy appearance and do not break. Wind felt on ace, leaves rustle, ordinary wind vanes moved by wind 3 Gentle breeze Large wavelets. Foam Crests begin to of glassy appearance.
Wind raises dust and loose paper, small branches move.
5 Fresh breeze Moderate waves, taking a more pronounced form, many white horses are formed. Chance of some spray. Small trees in leaf start to sway, crested wavelets on inland waters. 6 Strong breeze Large waves begin to form, the white foam crests are more extensive everywhere. Probably some spray Large branches in motion, whistling in telegraph wires, umbrellas used with difficulty.