Wave-by-wave forecasts in directional seas using nonlinear dispersion corrections

We develop a new methodology for the deterministic forecasting of directional ocean surface waves, based on nonlinear frequency corrections. These corrections can be pre-computed measured energy density spectra, and therefore come at no additional computational cost compared to linear theory. The is tested highly-nonlinear, synthetically generated seas with variety values average steepness spreading, shown consistently outperform forecast.