The first German submarine movie after World War I.
The Finnish submarine "Iku-Turso" was used in some scenes. Ufa (the production company) also purchased the Finnish schooner "Maria av Viborg" to be blown up as the British U-boat trap in the battle scene.
The British armored cruiser is portrayed by the German light cruiser Emden, the escorting destroyers were German Type 1923/1924 torpedo boats.
The first film to be screened under the new Nazi government; its premiere was just three days after Adolf Hitler took power in Germany. Hitler himself was present at the premiere in Berlin, two days after its official German premiere.