This is a pretty cool site some guy on a dive to U-352.
http://www.nc-wreckdiving.com/WRECKS/U352/U352.HTML
I was watching a show on it, they said the Captian of U-352 was trying to win a Knights Cross trying to sink alot of tonage. They took a shot at a ship, thought it was a cargo one maybe? Turns out it was a Coast Gaurd Cutter, the torpedo hit the ocean floor, and Icarus was one of the few Coast Gaurd sub hunters that had an extremly well trained crew in sub hunting. So they think the depth charges damaged the gravity fed fuel pump and the electric was out. Thats all I really know about it, but it seemed really really interesting.
[edited for typo]
