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The WMO Sea State Code categorizes sea conditions based on wave height, adapting the 'wind sea' definition from the Douglas Sea Scale. It includes a range of classifications from 'calm' at 0 meters to 'phenomenal' for waves over 14 meters. Each category is designated a specific wave height range, providing a standardized framework for assessing sea states.
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- 1. World Meteorological Organization sea state code The WMO sea state code largely adopts the 'wind sea' definition of the Douglas Sea Scale. WMO Sea State Code Wave height Characteristics 0 0 metres (0 ft) Calm (glassy) / Tenang (Kaca) 1 0 to 0.1 metres (0.00 to 0.33 ft) Calm (rippled) / Tenang (Bergelombang) 2 0.1 to 0.5 metres (3.9 in to 1 ft 7.7 in) Smooth (wavelets) / Halus (Ombak Kecil) 3 0.5 to 1.25 metres (1 ft 8 in to 4 ft 1 in) Slight / Sedikit Berombak 4 1.25 to 2.5 metres (4 ft 1 in to 8 ft 2 in) Moderate / Ombak Sedang 5 2.5 to 4 metres (8 ft 2 in to 13 ft 1 in) Rough / Ombak Kuat (Berat) 6 4 to 6 metres (13 to 20 ft) Very rough / Ombak Sangat Berat 7 6 to 9 metres (20 to 30 ft) High / Gelombang Tinggi 8 9 to 14 metres (30 to 46 ft) Very high / Gelombang Sangat Tinggi 9 Over 14 metres (46 ft) Phenomenal / Badai (Taipun)