Well, I've been sinking ships with torpedoes at last.
But the torpedo process is not very well explained. Did the U-boat have to be pointing directly at the target at the moment of firing, or was it possible to tell the torp what bearing to steer? In that case, the Uboat need only be pointing in the general direction of target.
Is it possible to "fire and forget"? Or do you have to keep your periscope view locked on target until impact?
Hmm, the torpedo tutorial (in English) is less than 3 minutes in length. I bet the RL torpedo crews did more training than that.
Right now, it all seems a bit vague.