State of Sea
| Descriptive term | Height in Metres | Wind speed in knots (kmph) | Beaufort scale |
| Calm ( glassy) | 0 | 0 | 0 |
| Calm (rippled) | 0 - 0.1 | 1 - 3 ( 2 - 6) | 1 |
| Smooth (waveless) | 0.1 - 0.5 | 4 - 10 ( 7 - 19 ) | 2 - 3 |
| Slight | 0.5 - 1.25 | 11 - 16 (20 - 30 ) | 4 |
| Moderate | 1.25 - 2.5 | 17 - 21 ( 31 - 39) | 5 |
| Rough | 2.5 - 4.0 | 22 - 27 (41 - 50) | 6 |
| Very rough | 4.0 - 6.0 | 28 - 33 (52 - 61) | 7 |
| High | 6.0 - 9.0 | 34 - 40 (63 - 74) | 8 |
| Very high | 9.0 - 14.0 | 41 - 63 (76 - 117) | 9 - 11 |
| Phenomenal | Over 14 | 64 or above (119 or above) | 12 |