Obstacle Clearance Altitude
- Obstacle Clearance Altitude
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Unter Obstacle Clearance Altitude (OCA) versteht man in der Luftfahrt die Höhe über MSL, in der bei einem Instrumentenanflug noch Freiheit von Hindernissen besteht. Sie ist vor allem für den Flug unter Instrumentenflugbedingungen von Bedeutung. Unter Off-Route Obstacle Clearance Altitude (OROCA) versteht man Höhenangaben für rechteckige Abschnitte in Streckenkarten (Enroute Charts). Bei Einhalten dieser Mindesthöhe ist ein vertikaler Abstand zu Hindernissen von mindestens 1000 ft, in gebirgigem Gelände von 2000 ft gewährleistet.
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appropriate obstacle/terrain clearance altitude — A specified minimum published altitude that must be flown by an aircraft to ensure safe flight over an obstruction or specified terrain. These include minimum IFR (instrument flight rules) altitude (MIA), minimum en route altitude (MEA), minimum… … Aviation dictionary
obstacle assessment surface — A defined surface intended for the purpose of determining those obstacles to be considered in the calculation of obstacle clearance altitude/height for a specified ILS (instrument landing system) facility and procedure (ICAO). See also obstacle… … Aviation dictionary
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minimum holding altitude — The lowest altitude prescribed for a holding pattern, which complies with requirements for obstruction clearance and ensures good reception of radio signals and of navigational aids. The minimum holding level provides a clearance of at least 1000 … Aviation dictionary
