is it realistic?

[ddiplock]

I know Allied ASDIC got good near the later years of the war, but did it really get so good that it could pick up a boat at 255mtrs like mine is?? Surely with thermal layers and all that guff, he shouldn't be able to detect me when i'm that deep. Does SH3 simulate thermal layers? But this lone destroyer who i've run into, is proving impossible to shake off.

None of his DC's have damaged the boat yet and they have been pretty easy to avoid. However, no matter what course I make, no matter how deep I go, as soon as he starts banging away with his ASDIC after a DC run, he finds me straight away, decoys are absolutley useless, so much for installing them on my boat!!!

I'm feeling very frustrated I can't shake this lone destroyer and his constant ASDIC pinging is breaking down my mental stability, lol, and feel tempted to surface just to take my anger out on him with my deck gun and my multitide of flak guns....but i'm sure that would mean certain death