Have a look at the Type II torpedo room thread, you may want to splash around in the North Sea a bit in GWX4 before hitting the Atlantic. It is a long thread but go deep into it, you will be amazed.
http://www.subsim.com/radioroom/showthread.php?t=141858
Then look at the VII Engine room thread
http://www.subsim.com/radioroom/showthread.php?t=153853
I have a feeling your "Oh my God" will be all in caps after