Fair wind for relaxed sailing is from 7 to 16 knots.
| B/F | M/S | KM/H | KNOT | WIND |
| 00 | 0.02 - 0.2 | 0 - 1 | 0 - 1 | calm |
| 01 | 0.3 - 1.5 | 1- 5 | 1- 3 | light breeze |
| 02 | 1.6 - 3.3 | 6 - 11 | 4 - 6 | breeze |
| 03 | 3.4 - 5.4 | 12 - 19 | 7 - 10 | sotly blowing wind |
| 04 | 5.5 - 7.9 | 20 - 28 | 11 - 16 | moderate wind |
| 05 | 8.0 - 10.7 | 29 - 38 | 17 - 21 | quite hard wind |
| 06 | 10.8 - 13.8 | 39 - 49 | 22 - 27 | hard wind |
| 07 | 13.9 - 17.1 | 50 - 61 | 28-33 | very hard wind |
| 08 | 17.2 - 20.7 | 62 - 74 | 34 - 40 | gale |
| 09 | 20.8 - 24.4 | 75 - 88 | 41 - 47 | stor |
| 10 | 24.5 - 28.4 | 89 - 102 | 48 - 55 | strong gale |
| 11 | 28.5 - 32.6 | 103 - 117 | 59 - 63 | violent storm |
| 12 | 32.7 - | 118 - | 63 - | hurricane |