Definition
A commercial business operating at an airport that provides aeronautical services to pilots and aircraft, such as fuel, parking, hangar space, tie-downs, aircraft rental, flight instruction, and minor maintenance.
Plain English
The business at an airport where you go to buy fuel, park your plane, get a rental car, or arrange basic services for your aircraft.
Context Anchor
Seen on airport destination signs, airport diagrams, and airport information listings when a pilot needs to find the service area on the field.
Derivation
Called 'fixed-base' because, in the early days of aviation, many operators were 'barnstormers' who travelled from field to field. An operator with a permanent location at one airport was a 'fixed' base — and the name stuck.
Why Pilots Care
FBOs are the primary source of fuel, maintenance, and ground support when operating away from home base.
Intuition Check
Do not read fixed-base operator as a person operating a fixed piece of equipment. In this context, it means an airport-based service business for aircraft and pilots.
Example Sentence 1
After landing, we taxied to the FBO to fuel up and grab a weather briefing before the next leg.
Example Sentence 2
Many FBOs offer rental cars and crew lounges for pilots making overnight stops.