📢 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 Because the FAA now maintains its own dynamic version of the Pilot/Controller Glossary, this version is no longer updated.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: |
ALONG-TRACK DISTANCE (ATD) |
|---|---|
| Meaning: | The horizontal distance between the aircraft's current position and a fix measured by an area navigation system that is not subject to slant range errors. |
| Previous Term: | ALNOT |
| Next Term: | ALPHANUMERIC DISPLAY |