I've been playing the game the same as SH3, i just patrol the area that im told to and ignore the overall mission. Sinking anything that i come across.
Unfortuently i dont think im going to make it any further into the campaign (check my sig).
I play 100% realism and dead is dead. And it looks like im going to be dead very soon. Both electric engines are dead and theres not enough sea under me to lose the escorts pinging me.
I blame Nisgeis' U-boat Killer AI Mod for this situation.
Hope that i do manage to survive, But even if i dont. I had alot of fun.