Definition
An annotation indicating that a Flight Service Station (FSS) or other facility does not have the capability to communicate by radio with aircraft in flight. Pilots cannot reach the facility while airborne; contact must be made by other means, such as telephone before or after the flight.
Plain English
A note that a particular ground station can't talk to airplanes by radio while they're flying. You'd have to phone them on the ground instead.
Context Anchor
Seen in instrument procedure notes, chart information, and aviation reference material where communication availability is being described.
Derivation
‘A/G’ is shorthand for ‘air-to-ground,’ meaning radio communication between an aircraft in the air and a station on the ground. ‘NO A/G’ simply states that this capability is absent at the listed facility.
Why Pilots Care
Pilots must know in advance whether they can receive clearances, weather updates, or instructions by radio before entering the area.
Grounding Statement
Picture reaching that part of the flight and having no usable radio link to the ground station mentioned in the procedure.
Intuition Check
NO A/G does not mean the aircraft has no radio. It means that this procedure or facility does not provide a usable aircraft-to-ground radio link in that context.
Example Sentence 1
The Chart Supplement listed the FSS as NO A/G, so the pilot called Flight Service by phone before departure to file the flight plan.
Example Sentence 2
Because the airport had NO A/G, all position reports were made through a nearby relay aircraft.