Something unusual I noticed. I have NYGM crew management mod and its great, but a serious bug exists.
It seems when you submerge and use the diesels and snorkel, that the crew in the diesel room does not fatigue. However, if you put them in the motor room, they do
In NYGM, the unused engine rooms are rest areas where no further fatigue takes place. Everything works as it should when you submerge below the snorkel depth.
Its too bad because NYGM is the best crew fatigue model I ran into.