About the field of scattering in a plane-layered waveguide

The expressions allowing one to calculate the resulting field of an opaque source, and also the field of scattering of a heterogeneity for located in the Fraunhofer zone for plane-layered waveguides are given. In both cases the amplitude of scattering of the heterogeneity is needed to be known. The restriction on uniformity of a water layer is removed except for the layer containing a heterogeneity.