Battleship tonnage or the merchant shipping?

[JohnnyBlaze]

All right I finally managed to fire my torpedoes. After third attempt I got into a position to shoot at the two tankers which both went down in 15 minutes.

I had to let the BB go cuz I didn’t want to put my boat at too much risk.

Four torpedoes, two targets, three hits and about 34000tons.

It's still dark so it's pretty easy to get out of the convoy without being spotted. Now heading back to base after another successful patrol. 5 ships sunk and about 58000tons of cargo.