The OASES-OASP module calculates the depth-dependent Green's function for a selected number of frequencies and determines the transfer function at any receiver position by evaluating the wavenumber integral. The frequency integral is evaluated in the Post-processor PP. As is the case for OASES-OAST, both stresses and particle velocities can be determined, and the field may be produced by either point or line sources. By arranging the sources in a vertical phased array, pulsed beam propagation can be analyzed.