Harris could expect about 800 serviceable heavy bombers for each raid, equipped with new and sophisticated navigational devices such as H2S radar. The USAAF, having recently lost many aircraft in attacks on Schweinfurt, did not participate. The Main Force of Bomber Command attacked Berlin sixteen times but failed in its object of inflicting a decisive defeat on Germany. The Royal Air Force lost more than 7,000 aircrew and 1,047 bombers, 5.1 per cent of the sorties flown; 1,682 aircraft were damaged or written off. On 30 March 1944, Bomber Command attacked Nuremberg with 795 aircraft, 94 of which were shot down and 71 were damaged. The Luftwaffe's I. Jagdkorps recorded the loss of 256 night fighters from November 1943 to March 1944.