She was constructed in the earliest days of the U-boat arm at Kiel in 1936, and served in the pre-war Navy in the Baltic Sea and North Sea under Kapitänleutnant (Kptlt.) Klaus Ewerth.
The vessel was constructed in the initial stages of the U-boat program at Kiel in 1936, and operated within the pre-war navy in the Baltic and North Seas under the command of Kapitänleutnant Klaus Ewerth.