Hideous business - shame that it was relegated to this forum - I hadn't even noticed it existed before. This story is certainly news, and probably a lot of it is rumour too. Subs have a lot in common with planes too.
I throroughly recommend a book called by "Blind Man's Bluff" - by 3 different authors - currently in print. It describes much of WW2 and Cold War sub operations, from both sides points of view - gripping stuff.
JJM