[PepsiCan]

My experience is that the auto targeting aims for midship. But you can still adjust the direction of torpedo by using the dail to set up a spread. So, if you fire three torps and set the dial for the first to 0, for the second to -1 and the third to +1 you will hit the ship at various spots. At the same time, you can assume the ship to start doing an emergency turn as soon as the torpedos are spotted.