U.S. Army Corps of Engineers Previously designated as Detachment 1 of the 23rd Wing (23 WG) until August 2014 and Det 1 of the 23d Fighter Group (23 FG) until August 2015, the 598 RANS is unique among MacDill AFB's tenant units in that it operates both (1) the Deployed Unit Complex (DUC) at MacDill AFB, providing a separate flight line facility and support infrastructure for detachments of USAF, U.S. Navy, U.S. Marine Corps (to include Reserve and Air National Guard) and NATO/Allied fighter, attack and special operations aircraft utilizing the nearby Avon Park Air Force Range (APAFR) facility, and (2) operates and maintains the entire 20,000 square mile APAFR facility approximately 65 miles east of MacDill AFB. An Air Combat Command (ACC) organization, the 598 RANS reports to the Commander, 23d Fighter Group, at Moody Air Force Base, Georgia. MacDill AFB also supports other Active Component and Reserve Component military activities and personnel of the U.S. Army, U.S. Navy, U.S. Marine Corps, U.S. Air Force and U.S. Coast Guard in the West Central Florida/Tampa Bay Region, as well as the large military retiree community in the Tampa Bay area and surrounding environs. Based units Flying and notable non-flying units based at MacDill Air Force Base. Units marked GSU are Geographically Separate Units, which although based at MacDill, are subordinate to a parent unit based at another location. United States Air Force Air Mobility Command 6th Air Refueling Wing (Host wing) 6th Operations Group 6th Operations Support Squadron 50th Air Refueling Squadron – KC-135R Stratotanker 91st Air Refueling Squadron – KC-135R Stratotanker 6th Maintenance Group 6th Aircraft Maintenance Squadron 6th Maintenance Operations Squadron 6th Maintenance Squadron 6th Medical Group 6th Aerospace Medicine Squadron 6th Dental Squadron 6th Medical Operations Squadron 6th Medical Support Squadron 6th Mission Support Group 6th Civil Engineer Squadron 6th Communications Squadron 6th Contracting Squadron 6th Force Support Squadron 6th Logistics Readiness Squadron 6th Security Forces Squadron Air Force Reserve Command (AFRC) 927th Air Refueling Wing 927th Aerospace Medicine Squadron 927th Aeromedical Staging Squadron 927th Operations Group 45th Aeromedical Evacuation Squadron 63rd Air Refueling Squadron – KC-135R Stratotanker 927th Operations Support Squadron 927th Maintenance Group 927th Aircraft Maintenance Squadron 927th Maintenance Squadron 927th Mission Support Group 927th Force Support Squadron 927th Logistics Readiness Squadron 927th Security Forces Squadron Air Combat Command (ACC) Air National Guard (ANG) Florida Air National Guard 290th Joint Communications Support Squadron United States