Hmm, ok. Then I missunderstood you. (my english isn't the best

)
I thought it worked, when I used it with my old SH3. And in my last Patrol (GWX 3.0), I fired a single torpedo under the front guns of a Southhampton where I expected the Ammo Bunkers and I got nice fireworks and a single torpedo kill (about 2km distance), so I thought this might work.
But I don't know enough about the damage system of SH3, my modding experience is very limited. (Mostly editing .cfg files and other easy stuff.)
EDIT: @Lagger123987: That's the point

@bigboywooly: I just looked at your upload. It does exactly the same, like my old mod. I had just a german version. And this does't work? *confused*