In November 1943 Bomber Command was ordered to carry out a sustained attack on Berlin by Air Officer Commanding (AOC) Arthur Harris. The offensive was dubbed the Battle of Berlin, through which Harris was given an opportunity to strike a war-winning blow. In retaliation Adolf Hitler and Hermann Göring, commander in chief of the "Luftwaffe", initiated Operation Steinbock. It called for retaliatory attacks on Greater London. The operations were on a much smaller scale than the Blitz in 1940–41, but it required a sizeable defence effort. Burbridge took a Mosquito NF.XII as his personal aircraft. It was equipped with a low-SHF-band AI Mk VIII. These centimetric radar sets were mounted in a solid "bull nose" radome—a smooth nose which did not need external aerials. It required the machine guns to be dispensed with, but the fighter was still equipped with Hispano-Suiza HS.404s—20 mm caliber cannon.