You may define any number of User Defined Spectrum objects in your analysis, but they will only be used in the calculation if they are selected in the User Defined Spectrum column of the Ocean Environment Wave Case Definition table.

Use the Spectrum Data tabular data input to define Angular Frequency ordinates and their corresponding Spectral Energy Density values. Click the   icon to add more rows to the table. The Spectrum Data table must have at least two pairs of frequency/energy density values.