Which altitude do pilots need to maintain to avoid terrain according to OROCA in mountainous regions?

In mountainous regions, the OROCA, or Off Route Obstacle Clearance Altitude, is designed to ensure that pilots maintain a safe altitude above obstacles and terrain, effectively providing a buffer to avoid collisions during flight. The OROCA takes into account a significant safety margin, which involves at least 2000 feet of clearance above the highest obstacle within a given area plus an additional safety buffer.

Choosing the altitude of 2000 feet is correct because it provides the necessary clearance required under OROCA guidelines in mountainous terrain, ensuring pilots are adequately protected from hidden hazards. This safety margin is crucial in regions where steep elevations and sudden terrain changes are present, making adherence to this altitude vital for enhanced safety during flight operations in such challenging environments.