Try the Hollywood Damage Mod. The damage done to the uboat is more, I guess, "intense." :hmm:
The damage in the uboat takes longer to repair, and crew members get seem to get killed/wounded a little more. Don't know if it is exactly what you are looking for, but I think it will suffice.
Check it out here:
http://www.subsim.com/phpBB/viewtopi...llywood+damage
It really does something about that "tiger tank" uboat.