[AVGWarhawk]

In all reality, asdic was useless about 200m infront of the ship using it. Therefore, when you hear the high RPM of the ships engines and the pinging stops, the ship is on his depth charge run. It is at that point you hit full throttle and turn hard left or right because he has lost you and is making his best guess at your location. Do hard knuckes help? Yes they do as you are now headed in a different direction than the asdic operator believes you are going. Once the ship has dropped his charges and is moving off, drop to silent running once more. I do not know how modelled in the losing of U-boat contact is but I sure lose the warships on my hydrophone when they are 180 degrees behind me. In other words, my electric engine noise has drowned out the noise from the warship. So I would suspect that your dodge and perry make you elusive to the asdic.