27th U-boat Flotilla
|Active||January 1940–March 1945|
FrgKpt. Werner Hartmann|
Korvkpt. Erich Topp
Kptlt. Ernst Bauer
The flotilla was founded at Gotenhafen in January 1940 under the command of Korvettenkapitän Ernst Sobe as Taktische Unterseebootsausbildungsflottille ("Tactical U-boat Training Flotilla"), and was redesignated 27. Unterseebootsflottille in June 1940.
This was where new U-boat crews received their tactical training (Taktische Ausbildung Unterseeboote), also taking part in an eight- to fifteen-day tactical exercise (Taktische Übung), a simulated convoy battle in the Baltic Sea. A U-boat might have to take part in more than one exercise, for example U-109 needed two attempts in the spring of 1941, before being declared combat ready. The flotilla was the last training station for new U-boats. It disbanded in March 1945.
- Korvettenkapitän Ernst Sobe (January 1940–December 1941)
- Fregattenkapitan Werner Hartmann (December 1941–October 1942)
- Korvettenkapitän Erich Topp (October 1942–August 1944)
- Kapitänleutnant Ernst Bauer (October 1944–March 1945)
One U-boat was assigned to this flotilla during its service.