Accident of freak wave collision with a ship in the Agulhas current is described with appropriate weather conditions and non-uniform current speed distribution. Satellite observation shows an essential wave height enlargements in the current. Using a spectral mathematical model this fact is explained as a result of wind wave and current interaction. Thus, the appearance of freak wave is explained as a result of wind wave transformation in the Agulhas current. Swell is captured and intensified by the counter-current and is directed into the region of the maximum value of the current velocity, as a result there is a great concentration of the wave energy density. The superposition of wind sea with swell transformed by the current promotes formation of the freak waves.

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