When this thread first started, I post a reply but thought I had misread what the issue was about. At that time I checked out the Real U-boat simualtion site and had no problem accessing it or the downloads.
Thinking that I had missed the point I edited the post to read "please ignore"; you can find it at the top of this thread.
Personally I have found Terrapin's site to be supportive and never questionable. It provides a valuable service to us and especially to those of us who cannot access the likes of rapidshare, etc because of our ISP. It is my intention to continue to support and applaud the hard work down by Terrapin.