BEAUFORT WIND FORCE SCALE
Francis Beaufort, 1805
Standardised 1946 · Thirteen forces
Force 00

CALM

0 kn <1 km/h wave height 0 m

Sea like a mirror.

Smoke rises vertically.

Force 0, Calm, 0 kn

Scroll to raise the wind
Station 58°44′N  011°12′E
Appendix · The card

The thirty-
two points

Before degrees, the wind had names. Thirty-two points, each 11°15′ apart, recited aloud from north and back again — a drill every apprentice learned before he was let near the helm.

Trace the card to read a point

North
000°00′