Responsible for controlling anti-aircraft batteries and air-to-air interceptions of Japanese raiders, the unit was renamed No. 114 (Mobile) Fighter Sector on 18 October. It registered its first "kill" on 31 October, when it directed a Spitfire of No. 79 Squadron to intercept a Japanese "Tony" fighter north-east of Kiriwina. On 2 March 1944, No. 114 Fighter Sector began redeploying with No. 73 Wing from Goodenough to Los Negros Island. Charged with coordinating air defence during the Admiralty Islands campaign, it was renamed No. 114 Mobile Fighter Control Unit (MFCU) five days later. The redesignated unit became operational on 2 April, and controlled Nos. 337, 340, 345, 346 and 347 Radar Stations.