Some of what KM found there was in FotRSU also, and the engine rpm versus "power" seems to matter. If certain ships fall below roughly 3 knots, they will "disappear" to sonar. The DD disappear at around 12 knots. Roughly 1/3 of a ship's speed, but it is dependent upon the rpm, power, etc in the sim file. But, in this case, I think it's the electric motor sound on a surface vessel, instead of the diesel sound. I'm doing some noodling right now, and might have the test finished in a bit - if I don't fall asleep before hand... lol
Edit: Fourth try now, and I'm still getting the same high-pitched electric engines, trying to push the boat along at 9 knots on the surface, and no diesel sound... the names all look good, the links all look good, the SH.sdl looks good, the actual diesel sound sounds like a diesel... I am overlooking something... sigh. It's too late for my mind to be attempting to function for this... lol
