air filtration unit

dilution filtration unit

filtration rate

fuel filtration equipment

solution filtration

filtration factor

battery coolant unit / battery-coolant unit (BCU)

gear reduction unit / gear-reduction unit

position and navigation unit / position navigation unit (PNU)

pinch (a unit) out of a large unit

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

air assault infantry unit

air defense fire unit

Special Operations Air Tasks Unit (SOATU)

air unit

army air photograph interpretation unit

unit air defense

air-flow metering unit

air data unit

casualty air evacuation unit

air force special operations unit

carrier air unit

air base service unit

air dispatch unit

air force base unit

air intelligence liaison unit

air intelligence unit

advanced medium range air-to-air missile (AMRAAM)

air force air request net

Air Force tactical air direction net

air interdiction (AI), deep air support (DAS)