the Air Force's flying operations were merged into the Air Force Readiness Command (AFRC), which was organized into 12 wings and the 1st Air Defense Brigade. The four air forces were disbanded and their flying squadrons were re-assigned to the air bases, which in turn were subordinated to the air force regions, giving them operational tasks. Air units organization At unit levels, "Groups" () usually consist of one to sixteen consecutively numbered "Squadrons" (), each with varying numbers of aircraft, usually from six to 12. Smaller formations are known as "Flights" (). According to its tasks, a group has one of the following designations: Air Defense Group: : Air defense fighters. (Fighter Jets) Transport Group: : Transport, Flight refueling Aviation Group: : Fighter, attack, reconnaissance, SAR, rotary wing Fighter Aviation Group: : Fighter, attack planes Troop Transport Group: : Transports, troop carrying, parachutist drop Special Flight Inspection Group: : Calibration Special Test Flights Group: : Test flights Special Transport Group: : VIP transport Common used designations for squadrons are: Air Transport Squadron: Air Training Squadron: Demonstration flying team: (also called ) The Military Units of the Brazilian Air Force are: Airspace Control Department Air Traffic Control in Brazil is militarised and under the Air Force. This is a legacy from the time when each of the three armed serviced was under its own government ministry and the corresponding Ministério da Aeronáutica (MAER) was in charge of both the FAB and civil aviation. The Airspace Control Department (Departamento de Controle do Espaço Aéreo (DECEA)) was established in 1942 and due to the civil-military character of the former Ministry of Aeronautics it developed into a heterogenous service tasked with air force communications, operations command and control, civil air traffic control, aerial navigation systems calibration and meteorology, even including a disciplinary council for violations of airspace directives. Airspace Control Department (Departamento de Controle do Espaço Aéreo (DECEA)) - Rio de Janeiro - Santos Dumont Airport, RJ (co-located with the 3rd Air Force Region Command) Airspace Control System Implementation Committee (Comissão de Implantação do Sistema de Controle do Espaço Aéreo (CISCEA)) - Rio de Janeiro - Santos Dumont Airport, RJ Air Movement Management Center (Centro de Gerenciamento da Navegação Aérea (CGNA)) - Rio de Janeiro - Santos Dumont Airport, RJ 1st Integrated Air Defence and Air Traffic Control Center (1º Centro Integrado de Defesa Aérea e Controle de Tráfego Aéreo (CINDACTA I)) - Brasília