air navigation
аеронавігація
аеронавігація
position and navigation unit / position navigation unit (PNU)
technical work program in the air navigation field (TWPANF)
Special Committee on Future Air Navigation Systems
International Sanitary Convention for Air Navigation
Technical Work Program in the Air Navigation Field
aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)
air combat capable helicopter / air-to-air capable helicopter
air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen