War movies have been biases to one side or the other. This movie does not make hero's or enemies of the German U-boat sailors. Instead, it grips the viewer with realistic depictions of what it was like to be a U-boat sailor for the Gemans in WWII. It starts off with young (17 year old to 25 year old) who have been filled with propaganda about the war effort and glorious battle. After this young crew of immature sailors start to experience the true horrors of war, you can not only see, but experience with them the boredom, laughter, camaraderie, team work and death. In a world where you have no windows, where your ears have to be your eyes, where a cat and mouse game is played and the looser dies, these young men age 10 to 15 years It makes the viewer realize the horror of submarine warfare in WWII. The most realistic war movie I have ever seen.