Abstract
A computer program has been developed that allows a more economical approach to the problem of obtaining transmission-loss contours. Application of this program is limited to a medium in which the velocity structure is a function of the depth only and the boundaries are plane parallel. One of the bounding surfaces is assumed to be perfectly reflecting. The program computes transmission loss as a function of horizontal range and receiver depth for given source positions. Contours of constant loss are then obtained that provide a more complete quantitative picture of transmission than would otherwise be available. Results of sample computations are shown that illustrate many of the general features of sound transmission in the deep ocean. [Work supported by the Bureau of Ships, U. S. Navy Department.]
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