Waves 1. Regular Waves Regular Wave 2. Irregular Waves When using Irregular waves the sea state is described using a wave spectrum function. The Spreading Type option may be used to choose between a unidirectional or short crested sea state using a cosine spreading function. JONSWAP spectrum JONSWAP spectrum - 6 parameters JONSWAP spectrum - 3 parameters JONSWAP spectrum - 2 parameters Double peaked JONSWAP spectrum Pierson-Moskowitz Pierson-Moskowitz ISSC spectrum Pierson-Moskowitz spectrum with zero-crossing period Ochi-Hubble spectrum Numerically defined spectrum Spatially Varying Current Regular Wave