Similar to OASP, in addition to generating timeseries, OASSP may be used for generating the complex CW reverberant field over a rectangular grid in range and depth. Here again it should be noted that when OASSP is used with option 'O' or with automatic sampling enabled, the transfer functions are computed for complex frequencies. Complex frequency corresponds to applying a time-domain damping which cannot be directly compensated for in the transfer functions. However, real frequencies can be forced in automatic sampling mode by using option 'J' (Version 2.1 and later). In any case the frequency sampling must be consistent for the computation of the mean and scattered fields.