The OASES-OASP3D 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-OASP, both stresses and particle velocities can be computed, but the field may be produced by point or line sources with horizontal directionality (forces of arbitrary direction, seismic moment sources) as described in [10]. The solution technique is the 3-dimensional extension of the global matrix approach described in Ref. [11]. Otherwise, OASP3D and OASP are identical in terms of environmental models, receiver arrays, wavenumber sampling etc.