| Code figure | ||
|---|---|---|
| 0 | 0 knot | 0 km h-1 |
| 1 | 1 - 5 knot | 1 - 10 km h-1 |
| 2 | 6 - 10 knot | 11 - 19 km h-1 |
| 3 | 11 - 15 knot | 20 - 28 km h-1 |
| 4 | 16 - 20 knot | 29 - 37 km h-1 |
| 5 | 21 - 25 knot | 38 - 47 km h-1 |
| 6 | 26 - 30 knot | 48 - 56 km h-1 |
| 7 | 31 - 35 knot | 57 - 65 km h-1 |
| 8 | 36 - 40 knot | 66 - 75 km h-1 |
| 9 | Over 40 knot | Over 75 km h-1 |
| / | Not applicable (report from a coastal land station) or not reported (see Regulation 12.3.1.2 (b)). | |