Some comments on ray theory with examples from current NUC ray trace models

Abstract

Three topics were covered in this paper: 1. Ray Sweep-out Method - a technique for calculating sound intensities at a large number of receiver points in range and depth . 2. Bi-static Reverberation Model - a technique based on the superposition principle for relatively quick reverberation calculations 3. Ray/Wave Method - a technique for combining ray and wave methods in long range propagation calculations. Because material on the first two topics will be available in a review article by Bucker and Cybulski in the Journal of Underwater Acoustics, September 1971, only the third subject will be repeated in this surmnary.