well i took a merchant in its stern pretty deep and it stopped dead in the water after a while.
And it looked like it was taking water.
The second torpedo didn't do a thing
but the third in the bow did the rest

I really hate the torpedo's come on
i had one right in the middle and that ship should have been blown up because it was a tanker !
Pretty crappy job they did there but oh well i guess it will be fixed soon.