Fellow captains,
I can highly recommend the program "VoiceAttack" (available through Steam).
With it, I am now able to *fully* control any sub in Cold Waters! (okay, apart from aiming the torpedoes which still requires mouse control).
Other than that, I am feeling like a real skipper, shouting orders like:
"Full left rudder!"
"10 degrees rise on the planes"
"Load Tube 1"
"Ahead 1/3rd"
"Prepare to fire tube 1"
"Designate target!"
"Raise the ESM mast!"
... like I said, everything!
It works like a boss, really. It is so amazing!