There is absolutely no need for raytracing in the first place. It would not be better then the tables, since the tables itself would be based on raytracing. But raytracing alone is only valid for high frequencies and idealistic conditions. It's also good for estimating convergence zone range for example, and there could be such tool accessible from sonar station, but generaly it's only one solution for part of the problem.
Here I have to take all phenomemons I want to simulate, and find best approach.
Also realtime is not enough, since we want to use time compression, and lot of it.
And 'every listening platform' may be array of 50 sonobuoys .. the sonar really has to be done as fast as possible.
Look at DW . .even on my core duo 2.3 GHz it mostly does not manage to go 32x, if there is more platforms, and it fakes sonar in great way, especially for AI.
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