[AVGWarhawk]

The TDC works fine. I find more of a problem solver than anything. I can see where my calculations are off and I can then reset. My biggest obstacle is the speed calculations. I can determine this somewhat easily by watching the AOB dial. If it is change radically as compared to the vessel on the scope, the I know it is off. As far as convoys, once you speed is set and AOB, you just need to get the distance for the next ship you are going after. Update the TDC and your good to go. Not as slick as the German version, but it works.

Sounds like you have read up on the submarines, you probably noticed that they constantly popped up the scope getting bearings and speed. They did this all the way up to the point of firing. In reality, if you get the PK dead on, you can fire your torpedoes with scope down (many keep it up so as to see the torpedo at work).

You can also just point and shoot if you want. Leave the TDC off! Don't give up, it works!