madalaim kõrgus merepinnast (OCA) või madalaim kõrgus määratuna lennuvälja või raja läve kõrgusest, mis sisaldab teatud kriteeriumidele vastavat kõrgusvaru takistuste kohal
the lowest altitude or 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
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Valdkond ICAO lisade põhjal loodud klassifikaatori järgi: Lennutegevus
Staatus: kinnitatud
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Obstacle clearance altitude is referenced to mean sea level and 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 m (7 ft) below the aerodrome elevation. An obstacle clearance height for a circling approach is referenced to the aerodrome elevation.
See Procedures for Air Navigation Services — Aircraft Operations (Doc 8168), Volume I, Part I, Section 4, Chapter 1, 1.5, and Volume II, Part I, Section 4, Chapter 5, 5.4, for specific applications of this definition.
