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.
SS Admiral Nakhimov SS "Admiral Nakhimov (Russian: Адмирал Нахимов ), launched in March 1925 and originally named SS "Berlin, was a passenger liner of the German Weimar Republic later converted to a hospital ship, then a Soviet passenger ship. On 31 August 1986, "Admiral Nakhimov" collided with the large bulk carrier "Pyotr Vasev" in the Tsemes Bay, near the port of Novorossiysk, Russian SFSR, and quickly sank. In total, 423 of the 1,234 people on board died.