I've seen them in the Med in 1943 in Improved U-Boat.
It was actually a cool experience - while I was in base, La Spezia got taken over by the Allies, so when I started off I started hearing guns firing...
At me!
So: ALARRMMMM! Went to sehrohr-tiefe immediately, snuck out of the harbour which was now swarming with Allied ships and managed to sink quite a few of them before escaping to Toulon.
