I was in the Irish Sea (I think- its the strait between England and Ireland) and had the bizarre fortune of having a large escort and a task force moving TOWARD each other in a very narrow part of the strait. It was so awesome, there was a literal TRAFFIC JAM OF SHIPS; many ships will stop completely to avoid being rammed; this makes them perfect targets. I sank a Dido, an escort (both with their pants down, waiting for other ships to pass) a T3 tanker and a C3 cargo ship. The cargo ship exploded with such force it set a nearby ship on fire (can't remember if that one sank). I got the hell out of dodge but unfortuately I got gangraped by aircraft at dusk while recharging my batteries, and sank before I could even order to dive
Obviously out for revenge