When was the the ship launched ,that along with the Tripitz and the Lützow was a target for  Operation Source ?
German battleship Scharnhorst Scharnhorst was a German capital ship, alternatively described as a battleship and battlecruiser, of Nazi Germany's "Kriegsmarine". She was the lead ship of her class, which included one other ship, "Gneisenau" . 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. Completed in January 1939, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets. Plans to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets were never carried out.
USS Zeppelin (1914) USS "Zeppelin was a passenger liner launched in 1914 as SS "Zeppelin by Bremer Vulkan, Bremen-Vegesack, Germany, for Norddeutscher Lloyd (NDL). Due to the First World War she never entered NDL service. She had a career after the war first under White Star Line control, then briefly as the troop ship USS "Zeppelin, next as the Orient SN Co liner SS "Ormuz and finally back with NDL as SS "Dresden".