I have full operation Rheinubung done in SH3 mission editor - in several stages - from leaving the base in Gdynia, to going around Denmark, to parking in Norway, to Denmark Strait battle, torpedo Bismark bombing, and Bismark battle of biscayne/sinking. All done with weather/day/time simulation. I have to say it's eery feeling because things can be made so real, especially the night convoys and foggy search by the Home Fleet in iceland.. the icebergs. Etc. Probably no real value for U-boat hunting, but I'll release them all anyway, at least you could fight in Battle of Denmark and Battle of Biscayne. Never avoid a chance of sinking a BB.
So this is my mission editor project. It's a lot of fun recreating real events in SH3.