Obstacle clearance height (OCH) definition
Obstacle clearance height (OCH) means the lowest height above the elevation of the relevant runway
Obstacle clearance height (OCH) means the lowest height above the elevation of the relevant runway threshold or the aerodrome elevation, as applicable, used in establishing compliance with appropriate obstacle clearance criteria. Obstacle clearance height is referenced to the threshold elevation or in the case of non-precision approach procedures to the aerodrome elevation or the