📢 This glossary was created to be a dynamic version of the Pilot/Controller Glossary published by the FAA. Because the FAA now maintains its own dynamic version of the Pilot/Controller Glossary, this version is no longer updated.
| Term: |
OUT OF SERVICE/UNSERVICEABLE (U/S) |
|---|---|
| Meaning: | When a piece of equipment, a NAVAID, a facility or a service is not operational, certified (if required) and immediately "available" for Air Traffic or public use. |
| Previous Term: | OUT |
| Next Term: | OUTER AREA |