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ICAO 9993

M00000691

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ICAO 9993 Continuous Climb Operations (CCO) Manual (Doc 9993 AN/495)

standard by International Civil Aviation Organization, 2013

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An aircraft's fuel efficiency in terms of fuel burned per kilometre flown in level flight increases with height. However, the fuel used in climbing to that altitude can be a significant part of the overall fuel used for the flight. Therefore, for any given route length, there is an optimum initial cruise flight level which will be dependent upon the aircraft type and mass, as well as on the meteorological conditions of the day. Continuous climb operations (CCO) is only one of the tools involved in a complete airspace design. Throughout the design process, continuous descent operations, continuous climb operations and other route modifications should all be considered.

Includes Corrigendum 1 (2013)