The obstruction clearance provided by OROCA ensures how much altitude in non-mountainous areas?

OROCA, or Off Route Obstruction Clearance Altitude, is designed to provide a minimum clearance over obstacles in non-mountainous areas. Specifically, in these areas, OROCA ensures an additional 1,000 feet of vertical clearance above any terrain or obstacle. This altitude is mapped to account for the highest obstruction in a given section, thereby giving pilots a safe buffer as they navigate through potentially hazardous airspace.

In contrast, the minimum clearance for mountainous regions is typically higher, at 2,000 feet, to account for the more substantial and varying elevation changes found in those terrains. It’s also important to note that OROCA does not provide obstacle clearance in areas with dense airspace and does not include safety margins for air traffic in those zones. Understanding this specific altitude helps pilots maintain safety and situational awareness when flying outside of controlled airspace.