And if you think you've got TM nailed down, try it at a full 100% realism. You don't realize how much of a crutch the external camera is until you don't have it. I hate/love being down in the depths, listening to the hydrophones, trying to figure out:
1. Which destroyer's gonna make its run next.
2. How I'm going to get my bow around so he can't ping me
3. How noisy the sub is, how noisy is has to be, and how noisy can I get before it kills me
4. Whether I can make a quick jaunt up to 'scope depth to get another round off
5. Whether there's a juicy target sitting on a nice firing solution when I get up to 'scope depth or not.
I've gotten really paranoid, and good at listening to the 'phones. I think the wife's starting to wonder about me, though...