A few suggestions:
- More dud torpedos! I have the Realistic Torps option enabled in SH3 but the only duds I ever get are when they impact at shallow angles or detonate early in heavy seas. Makes me wonder if dud torpedos are even in the game?...
- Bring back the torpedo running pattern in F6 view (for FAT and LUT torpedos). Apparently this can be done by changing the file DashLine.tga in \data\Menu\Gui
- Realistic player ranks: I don't think there were any U-boat commanders with the rank of a mere Leutnant z.S. Let the player start as Oberleutnant.
Here's how: edit de_menu.txt with the following
170=Oberleutnant z. S.
171=Kapitänleutnant
172=Korvettenkapitän
173=Fregattenkapitän
Fregattenkapitän may be equally unrealistic, but most players will never reach that rank anyway