Now I do the math. As before, the transmission is 50% at 80 feet. But, with the correct asymptotic falloff, the transmission is 25% at 160 feet, not 0. At 250 feet (where the second sub conning tower is) the transmission is about 11.5%. At the tail of the second sub, about 360 feet away, the transmission is about 4.4%. The transmission *never* goes to 0.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)