I got a really good impression of how delicate it was when I read Das Boot. I never thought that moving a sack of potatoes from fore to aft would have an effect. I also never thought about the sudden weight loss when firing torpedoes and having to pump large amounts of water in very quickly to stop the boat breaching the surface. It's a fascinating read and you get all the detail on life in a sub that the film couldn't capture....why do I get the feeling this post should be in another certain thread...
