[XenonSurf]

Auto TDC doesn't work by entering data in the dials or WO officer pop-up message, it is in fact much, much simpler:


First you must deactivate Manual TDC in the game options; unless you deactivate the last setting in the OFEV in the XOTDC tab, in which case you can switch from Manual TDC to Auto TDC in the WO message pop-up during game.
In-game, you then lock a target with spacebar (and optionally you identify it);
then you unlock again, this will send all calculations to the TDC automatically;
you then make the final aiming with the mouse on the ship part that you want to hit.
Finally, fire the torpedos that you have previously flooded and set speed and depth for. You will almost always score a hit because Auto TDC is nearly perfect except for duds.