I couldn’t find a good cap for that URL at the Wayback Machine (archive.org). Too bad.
Yes, I think it’s gone now.
It was a great research Site. The man who ran the site, he was a German guy, his father has been a U-boat commander. Never came home.
It was one of the most painstakingly meticulously research site I’ve ever seen. He listed every single U-boat from World War I and World War II, where it fought, what it sunk, and who sunk it, With the approximate location of the wreck, all based on captains logs.