Surely I wasn't the only one who started thinking of the best place to land torpedoes on this guy when I first saw it.
http://www.bbc.co.uk/news/science-environment-13709293
Ok, maybe Shell feels it's more of an off-shore oil platform than a ship, but if I were in the area in a U-boat and was at war with the "facilities" country, I'd probably send a salvo towards it...