Oh yes, that can definitely ruin your weekend...
There's a few others that have that many, but they don't seem to be as abundant as the Black Swan.
But then again, a group of regular Destroyers can also severely rain on your parade.
These guys caught me in 100 meters of water in late 1939 just east of Scapa Flow, I eventually managed to escape them minus 1 diesel, my flak, and half my hull integrity, I did have to emergency surface right in the middle of them, causing some friendly fire damage, then crashdive again in order to get them to stop dropping cans right on top of me. I spent 4 hours at 1x TC evading them while I should have been sleeping and getting ready for work the day after, but it was worth it
