Development of freak wave prediction method

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Freak wave is abnormal big wave, which causes various sea disasters. This study developed reliable prediction of freak wave. The definition of freak wave is the wave height larger than twice of significant wave in the train and the statistical distribution of maximum wave height as functions of wave spectrum parameters. The fourth-order moment of surface elevation is correlated with the maximum wave height and the freak wave is possible to prediction based on the wave spectrum information. The validity of the theory was verified by field data and experiments.