With the exception of one staunch Hitler Youth lieutenant, none of the crew is particularly loyal to the Nazis, and some are openly hostile toward their Fuhrer; this allows viewer sympathy with the men as they perform their laborious, monotonous duties in cramped, filthy quarters, or await death as depth charges explode all around the sub. Prochnow is excellent as the nerves-of-steel commander, and many of the supporting actors -- all German -- are solid as well, although the characterizations border on war movie clichés (the young crewman who has left behind his pregnant girlfriend, the Chief Engineer whose wife is seriously ill).
