FAC

FAC is a FAA Acronym for: Facility
Related Definitions from Aviation Glossary
GSA
GHA
Military Operations Area (MOA)
ATA - Air Transport Association
MRO ...

FAC- Forward Air Controller - implies ground-based controller embedded with ground units.
FAC(A)- Forward Air Controller (Airborne) Same, but a Hog instead of on the ground ...

FAC - Forward Air Control
FAE - Fuel Air Explosives - a powerful conventional bomb that explodes a canister or bag of potent fuel vapor just above the ground.

Many types flying close support or COIN (Counter Insurgency Warfare) missions were propeller powered types such as the O-1 and OV-10 Bronco FAC spotters, A-1 Skyraider, B-26 Invader, and AC-47[125] "Spooky" gunship.

Target marking by IR pointer. Target marking by gunship or FAC-A using incendiary rounds.
SPIKE
RWR indication of an AI threat in track, launch, or unknown mode. Include bearing/clock position and threat type, if known.

See also: Weather, Altitude, Aviation, Ident, Range