The speakers do give the impression of direction and not just with DCs. When cruising try turn around while you are in the sub. You will hear the engine noise adjusting according to your position. Its an intended feature but I dont think you can use it to avoid DCs. By the time you hear them they have already exploded so if you are alive, then they missed... that simple
As for the sonar guy. Lets setup a time and place and we'll do both our guys...
