When was the the ship launched ,that along with the Tripitz and the Lützow was a target for  Operation Source ?
Operation Source Operation Source was a series of attacks to neutralise the heavy German warships – "Tirpitz", "Scharnhorst" and "Lützow" – based in northern Norway, using X-class midget submarines.
German submarine U-2538 German submarine "U-2538" was a Type XXI U-boat (one of the ""Elektroboote"") of Nazi Germany's "Kriegsmarine", built for service in World War II. She was ordered on 6 November 1943, and was laid down on 24 October 1944 at the Blohm & Voss yard at Hamburg, as yard number 2538. She was launched on 6 January 1945, and commissioned under the command of "Oberleutnant zur See " Heinrich Klapdor, on 16 February 1945.