Atlas/ Glossary/ OFF-ROUTE OBSTRUCTION CLEARANCE ALTITUDE (OROCA)
ATC
OFF-ROUTE OBSTRUCTION CLEARANCE ALTITUDE (OROCA).
OFF-ROUTE OBSTRUCTION CLEARANCE ALTITUDE (OROCA)
- A published altitude which provides terrain and obstruction clearance with a 1,000 foot buffer in non-mountainous areas and a 2,000 foot buffer in designated mountainous areas within the United States, and a 3,000 foot buffer outside the US ADIZ. These altitudes are not assessed for NAVAID signal coverage, air traffic control surveillance, or communications coverage, and are published for general situational awareness, flight planning, and in-flight contingency use.
Related — ATC.
- ADAPTED ROUTES ADAPTED ROUTES
- ADDITIONAL SERVICES ADDITIONAL SERVICES — - Advisory information provided by ATC which includes but is not limited to the following:
- AIR TRAFFIC CONTROL AIR TRAFFIC CONTROL
- AIR TRAFFIC CONTROL SERVICE [ICAO] AIR TRAFFIC CONTROL SERVICE [ICAO] — - A service provided for the purpose of:
- AIR TRAFFIC CONTROL SPECIALIST AIR TRAFFIC CONTROL SPECIALIST — - A person authorized to provide air traffic control service
- AIR TRAFFIC SERVICE AIR TRAFFIC SERVICE — - A generic term meaning: