"2 battleships, 1 heavy cruiser" . "1943-09-22Z"^^ . "6midget submarines," . . . "Allied success" . . "6 conventional submarines" . . . . "Operation Source"@en . "9 killed, 6 prisoner" . "Operation Source was a series of attacks to neutralise the heavy German warships \u2013 Tirpitz, Scharnhorst and L\u00FCtzow \u2013 based in northern Norway, using X-class midget submarines.The attacks took place in September 1943 and succeeded in keeping Tirpitz out of action for at least six months.The attack was masterminded and directed from HMS Varbel, located in Port Bannatyne on the Isle of Bute."@en .