What are the wave heights of medium wave, big wave and huge wave?

Wave level: level 4, medium wave (wave height:1.25-2.50m, wind level 5) Sea condition: obvious wave shape, broken peaks, white waves everywhere, appearing in groups, and occasional water drops. At the same time, more obvious long waves began to appear. The fishing boat is obviously shaking, so it is necessary to take back part of the sail (that is, remove part of the sail).

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Wave level: level 5, big wave (wave height: 2.50-4 meters, wind level 6) Sea condition: Tall peaks begin to form, with bigger foam peaks everywhere and sometimes some water drops. The wave crest occupies a large area on the wave crest, and the wind begins to cut off the waves on the wave crest, breaking the waves into foam and forming strips along the wind direction. The ups and downs of fishing boats add drama, and most places need double sails, so pay attention to risks when fishing.

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Wave level: level 6, huge waves (wave height: 4-6 meters, wind level 7) Sea conditions: the wave wavelength is long, and tall peaks can be seen everywhere. Waves cut off by the wind on the peak began to extend in strips along the wave slope, and sometimes there were long waves of storm waves on the peak. The edge of the peak began to break into water droplets; The foam is obviously banded along the wind direction. Fishing boats will not sail in the port of call, but will anchor in the sea. ?

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The following figure shows the comparison table of wave grades: