Bandiera Grecia

Douglas scale

  State of the sea        Waves average height
0 Calm (glassy)   -
1 Calm (rippled)   0 - 0,10 metres
2 Smooth   0,10 - 0,50 metres
3 Slight   0,50 - 1,25 metres
4 Moderate   1,25 - 2,50 metres
5 Rough   2,50 - 4 metres
6 Very rough   4 - 6 metres
7 High   6 - 9 metres
8 Very high   9 - 14 metres
9 Phenomenal   over 14 metres


The "wind sea" is the motion of the waves generated by the wind blowing directly on the observed sea area or in its immediate vicinity