East Germany obtaining former German Kriegsmarine submarines according to a CIA report dated 7 January 1955

An item reported the possible transfer by the Soviet Union to East Germany of 10 submarines dating from the Second World War belonging to the former German Kriegsmarine seemed to be actually occurred. This transport was probably to get a parity in naval strength between East Germany and West Germany. On the other hand was reported that the East German navy possessed no submarines.

Source
The report was published on www.archive.org, document number CIA-RDP91T01172R000200020001-8