DOUGLAS SCALE
SECTORS CORRESPONDING TO EACH WIND. (in sexagesimal degrees)
| Grau | Catalan | Wave height | Spanish | english | french |
|---|---|---|---|---|---|
| GRAU 0 | flat sea | 0 m | sea wool | calm sea | calm sea |
| GRAU 1 | curly sea | < 10 cm | rippled sea | rippled sea | rippled sea |
| GRAU 2 | dizzy | 10 – 50 cm | tidal wave | smooth sea | beautiful sea |
| GRAU 3 | brown | 0.5 – 1.25 m | surge | slight sea | calm sea |
| GRAU 4 | strong brown | 1.25 – 2.5 m | strong sea | moderate sea | turbulent sea |
| GRAU 5 | marshmallow | 2.5 – 4 m | thick sea | rough sea | rough sea |
| GRAU 6 | angry sea | 4 – 6 m | very rough sea | very rough sea | very rough sea |
| GRAU 7 | melting sea | 6 – 9 m | wooded sea | high sea | big sea |
| GRAU 8 | very high sea | 9 – 14 m | mountainous sea | very high sea | very heavy seas |
| GRAU 9 | huge sea | > 14 m | huge sea | phenomenal sea | huge sea |
