Definition
The area within ten statute miles of an airport without an operating control tower, where a Flight Service Station is located on the field. At such locations, the FSS provides advisory service to arriving and departing aircraft.
Plain English
A circle of airspace ten miles around a non-towered airport that has a Flight Service Station on the field. The FSS gives pilots helpful information about traffic, wind, and runway use, but does not control them.
Context Anchor
You may see this term when reading about radio communication and advisory services at airports without an operating control tower.
Derivation
The word advisory comes from the Latin advisare, meaning to consider or give counsel. That captures the role exactly: the FSS advises rather than directs. Pilots make their own decisions inside this area.
Why Pilots Care
Pilots use this area to know exactly where to contact the Flight Service Station for traffic advisories and airport condition reports instead of relying on self-announcements alone.
Intuition Check
Do not read advisory as controlled. In this term, advisory means information is being provided; it does not mean a controller is directing the flight.
Example Sentence 1
Ten miles out, the pilot contacted the FSS for an airport advisory and learned the active runway and reported traffic in the pattern.
Example Sentence 2
The pilot requested runway conditions while still five miles out because the airport lies inside an Airport Advisory Area.