REQUIRED SUPPORT INCLUDES OPERATION AND MAINTENANCE OF VARIOUS ATC SYSTEMS AND RELATED EQUIPMENT AT THE SSC LANT ATC EQUIPMENT LABORATORY AND THE ASR AND DASR TEST BEDS AND THE PROVISION OF ON-SITE FLEET CASUALTY REPORT (CASREP) AND EXTENDED FIELD MAINTENANCE (EFM) SUPPORT TECHNICAL ASSISTANCE, AS NEEDED OR AS SCHEDULED, AT NAVAL AND MARINE CORPS AIR STATIONS WORLDWIDE.