Gerhart Beilharz was the German Kriegsmarine expert on snorkels. He was assigned duty as a second engineer onboard U-30 when that boat was selected to test the first snorkel. Lt. Julius Lemp was not initially impressed by either, privately viewing the need for a second engineer as the same as a fighter plane needing a second propeller on its tail. However, Beilharz was enthusiastic about his new toy and it proved useful on its first cruise, allowing Lemp to sneak up on a British cruiser and sink it. This article is a stub because the work is part of a larger, as-of-yet incomplete series.