free air

accident-free flying / mishap-free flying

mishap-free flying / accident-free flying

free fall air drop

free air temperature probe

free-air temperature

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

contact-free war

contamination-free

fallout-free

free fall

free fire zone

free mine

free naval control of shipping

free net

free neutron

free rocket

free-fall bomb

nuclear-free zone

toxic free area

free-fire area

impact free

mine free

weapons free zone (WFZ)

anti-aircraft free-flight rocket

free flight

free flight rocket

free-flight aerial rocket

free-flight phase

free-flight projectile range

free-rolling flight