📢 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 Because the FAA now maintains its own dynamic version of the Pilot/Controller Glossary, this version is no longer updated.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: |
OFF-ROUTE OBSTRUCTION CLEARANCE ALTITUDE (OROCA) |
|---|---|
| Meaning: | An off-route altitude which provides obstruction clearance with a 1,000 foot buffer in non-mountainous terrain areas and a 2,000 foot buffer in designated mountainous areas within the United States. This altitude may not provide signal coverage from ground-based navigational aids, air traffic control radar, or communications coverage. |
| Previous Term: | OFF COURSE |
| Next Term: | OFF-ROUTE VECTOR |