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 battleship Scharnhorst:  The ship was built at the "Kriegsmarinewerft" dockyard in Wilhelmshaven; she was laid down on 15 June 1935 and launched a year and four months later on 3 October 1936.
3 October 1936.