Off-Route Obstruction Clearance Altitude (OROCA)

An off-route obstruction clearance altitude (OROCA) is an off-route altitude that provides obstruction clearance with a 1,000-foot buffer in non-mountainous terrain areas, and a 2,000-foot buffer in designated mountainous areas. This altitude doesn’t guarantee signal coverage from ground-based NAVAIDs, ATC radar, or communications coverage. It can be seen here on this IFR low chart.

1. “You Should Know These 10 Minimum IFR Altitudes” BoldMethod

October 7, 2019 by Kyle Boas