 Later in the war it served under the 22nd U-boat Flotilla as a training boat, including "Oberleutnant zur See" Walter Sitek as an instructor.Sitek had previously escaped imprisonment after the disabling and sinking of by in February 1942.He swam to Pico Island in the Azores, made his way through neutral Spain and returned to the "Kriegsmarine" to serve as an instructor on "U-17", , and .