Obstacle Clearance Height

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Term Obstacle Clearance Height
Status


Mandatory for


Contexts


Categories ,
Synonyms


Related entries


Broader term


Narrower term


Abbreviation

  • OCH

Definition

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.

Definition Source

  • AIFDD

Note

Obstacle clearance height is referenced to the threshold elevation or in the case of non-precision approaches to the aerodrome elevation or the threshold elevation if that is more than 2 metres (7 feet) below the aerodrome elevation. An obstacle clearance height for a circling approach is referenced to the aerodrome elevation.