the film reveal the japanese view of themselves a the victim of atomic bomb . the crew of the submarine lorelei believe that they be fight for their homeland and the future of japan and hence sacrifice themselves at the end of the movie by surface on the water ( even though the area be surround by u fleet ) so that they can take down the u airplane which be carry the third atom bomb head for another drop in japan . of course the whole situation be fictional but the japanese should know that they never need to see hiroshima or nagasaki if those stupid japanese war maniac and that irresponsible emperor have surrender in prior .