Actually, the German TDC in SH3 and SH4 has an advantage over the American SH4 TDC in that the periscope can be hooked directly to the TDC to update the angle on the bow automatically so you can shoot when you want.
With the American TDC with the PK turned off you have to send a new bearing to the TDC manually to update.
The actual American TDC could do the same thing. It's a game design error that you cannot do so in SH4.
That being said, as far as the game is concerned it leaves American and German TDCs uh..........different. Both can update the bearing automatically, one by timer on the PK and the other by direct hookup between periscope and TDC. Properly executed, an attack by either method ends up with a BOOM!
Now let's argue whether one boom is better than the other.
