See the movie "Das Boot" on DVD:
http://www.amazon.com/exec/obidos/tg/detail/-/0767802470/102-8963170-2356922?v=glance
The Hollywood movie "U-571" is based on this German film which far surpasses it. It's based on a true story in which the crew of a German sub sunk by the British in WW2 raises the sub to the water's surface through excellent management, discipline & engineering skill. The sub's Captain reminds me of my late father, born in the USA of German & Austrian heritage and an excellent engineer. He loved measurement & precision.