BEAUFORT SCALE WIND FORCE
| DESCRIPTION | WIND SPEED IN KNOTS | ||
| Light airs, ripples Drifting conditions | 1-3 | |
| Light breeze,small wavelets Both need large sails to catch breeze | 4-6 | ||
| Gentle breeze,crests begin to break Large headsails & full mainsails | 7-10 | |
| Moderate,small waves becoming larger, frequent white crests Reduce headsails and full main(B) might start to reef | 11-16 | ||
| Fresh breeze,moderate waves many white crests, spray Reduce headsails and (B) starts to reef | 17-21 | |
| Strong breeze,large waves, white foam crests Less sail | 22-27 | ||
| Near gale,sea heaps up, white foam, breaking waves blown in streaks Both under reefed mains with small jibs | 28-33 | |
| Gale,moderately high waves, breaking crests, foam streaks Deep reefed mains, storm jib on (B) | 34-40 | ||
| Severe gale,high waves, crests tumbk' spray affects visibility (A) Storm jib & trysail, storm jib only on (B) | 41-47 | |
| STORMVeryhigh waves with long breaking crests. Survival conditions. | 48-55 |
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