Sound propagation simulation codes are widely used in underwater acoustics to predict the effects of propagation media on a received signal structure. The accuracy of an answer depends on how close the numerical model of a propagation channel is to a real environment. A newly developed numerical algorithm and originated normal mode range-dependent acoustical propagation code "SWAMP-V2" (Shallow Water Acoustic Modal Propagation, Version 2) are discussed. The new version of the code allows an inclusion of a multi-layered fluid-elastic sediment model and targeted for encompassing the procedure for the inclusion of an elastic scattering object as a part of propagation channel properties. The benchmarking results related to the model accuracy and computational performance are present.
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