So Rudy’s promise is soon forgotten—or at least it is forgotten by Bischoff. Bischoff derives strength from having heard it, and from similar things that members of his crew say to him, and from their grins and thumbs-up and slaps on the shoulder, and their displays of pluck and initiative, the clever repairs that they make to broken plumbing and overtaxed engines. Strength gives him faith, and faith makes him into a good U-boat skipper. Some would say the best who ever lived. But Bischoff knows many others, better than him, whose bodies are trapped in knuckles of imploded metal on the floor of the North Atlantic.