Spatial surface elevations of directional random waves have numerically been simulated for various directional spectral conditions in deep water and finite uniform depth water. Individual wave crests are defined on the simulated surface data and the statistics of crest lengths are examined. The ratio of the mean crest length to the local wavelength is found to be governed by the directional spreading parameter. The average longitudinal profiles of high wave crests are presented for three typical values of directional spreading parameters.

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