TDC and Gyroangle?

[Dunkopf]

I'm sorry, but I am having a hard time following the above suggestions... Am I missing something with "turning on the TDC?" The only way I know how to do that is to tell the guy who's icon pops up when you're looking through the attack periscope to turn on the TDC. Then, when you lock a target, he says "unknown ship, bearing such such, such and such a distance, speed so and so" and all that. I don't see a red button to input the numbers myself... heck, I don't see the TDC at all... and I also don't see the gyroangle. I'm probably missing something huge. I *do* have manual aiming set in my realism settings, but I can't find that red button or gyroangle anywhere.