The other aspects of TMO are much more challenging than a new player can tolerate, especially the enemy AI. I believe that a new player is much better served by playing stock until they have a handle on the game. TMO is not a training mode, it is a punishment mode for players who think they're too good!:rotfl:
It's a place where escorts can depth charge you accurately without pinging you at all. It's a place where planes bomb and depth charge you at and below periscope depth, sometimes even when you are 150' down. It's a place where you can be on silent running, pointing directly at the escort and they suddenly detect you from 2,000 yards away and charge you at 30 knots. It's a place with many, many more duds and deep runners. Abandon hope, all ye beginners who venture here.
