Hydromax is capable of analysing hydrostatics and stability in arbitrary waveforms as well as for a level water plane. To specify a waveform, select the Waveform command from the Analysis menu:

The water plane can be specified as flat, or as a sinusoidal or trochoidal waveform. If a waveform is specified, the wavelength, wave height and phase offset can be specified. The wavelength defaults to the waterline length of the hull at the DWL. If the wavelength is modified the wave height defaults to a standard metric wave, equivalent to:

Once a wavelength has been set, the wave height can be modified to give a non-standard height.

The phase offset governs the position of the wave crest aft of the forward end of the DWL, as a proportion of the wavelength. The phase offset varies between 0 and 1, both of which correspond to a wave crest at the forward end of the DWL.

For example, a phase offset of 0.5, with a wavelength equal to the waterline length, will give a single wave crest at amidships.