RTFM!!!!!!!:rotfl
I always wanted to say that) Luke posted a link to the real World War II sonar manual. Read it and learn the error of your ways, grasshopper. Those two sonar heads under water did indeed give contact info on the surface. The unknown factor to us is exactly how much.
If they give us grossly too much information Luke is right. Better for us to turn them off.
My position is the radar gives you the information too, so it's not as if the sonar gives you an advantage, because you already know whatever the sonar is telling you in much more detail. I contend that losing the ability to ping targets from the surface is a much more serious problem than getting too much info from an instrument that only tells you the bearing to a target you already know both bearing and range to from the radar! Therefore, if I am right, keep the sonar functional as the more realistic option. Beery seems to agree with me. Ducimus has yielded to the dark side.:rotfl: