Sorry, haven't been here much lately,
but I was sent this url -
http://tv-antenna.com/heavy-seas/
Amazing pics (check the gallerys, not just the front page)
I cannot image what seas like that would be like in a uBoat - I've been in 40ft seas in a 212ft ship, and that was scary enough. If anything, I think the sea-state in SHIII is conservative, especialy off Nova Scotia and NewFoundland.
Still playing SHIII, just not nearly as much as I'd like, but that's life.