Another U-boat was sunk off one of the Carolinas, battling with Coast Guard cutter Icarus. I think it was U352.
They came up fighting, manning the deck gun. The Coast Guard cutter unloaded on it, and basically prevented it from being able to dive; I believe they actually took it in tow, captured the enigma machine, but the U-boat started to sink and they had to cut it loose.
There used to be a great site called u-boat.net, and it had the location and engagements of every single U-boat from World War I and World War II.
I couldn’t find a good cap for that URL at the Wayback Machine (archive.org). Too bad.