1) Mods must be activated "one at a time" or can be activated all together? 2) Is there a mod for players like me, which gives on the periscopes the right firing solutions (to make an example...in SH3 it shows "000" when you have the right lead angle to fire your torpedoes and hit the target) ?

This is because I have not the skills, at least for now, to calculate target type, mast height, distance, speed, and so on...I would prefer an automatic firing solution...it is less demanding and boring...
Thank you again to all.