Hello,
funny that i have to defend a mod i was the first to criticize when it came out
The first 1-2 patrols are not easy, you have to command unexperienced people and officers to certain stations to keep the boat running. However that changes over time, after your 3rd patrol your crew will still experience this combat stress, but will be able to run engines, load torpedoes and so on even with a black mark. You have to train them though, after each mission you have the possibility to hand out medals, promotions and one training course for one of your officers. If you care for your men, they will reward this with better performance.
I'm currently having 3 torpedo men, 4 machinists, 2 gunners (deck gun), one FlAK/AA gunner, 2 radio men. Additionally i got a fifth officer with repairing and gunning qualification. As soon as i use him at a station within the engine room, for repairing or when the gunners are at station, the green bar will mostly be "full".
It's much more fun with this mod, besides you do not have to get your men to sleep all the time ...
Greetings,
Catfish