ATS 3.25 CONTINUOUS DESCENT OPERATIONS (CDO) AND CONTINOUS CLIMB OPERATIONS (CCO)

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ATS 3.25 CONTINUOUS DESCENT OPERATIONS (CDO) AND CONTINOUS CLIMB OPERATIONS (CCO)

Recent experience has proven the potential of new arrival procedures known as Continuous Descent Arrivals (CDAs). CDAs enable aircraft to make a more continuous descent from cruise to runway, saving fuel, reducing emissions, and reducing frequency congestion. ANSPs want to expand the use of CDAs. To regulate this activity, ICAO has produced Doc 9931, “Continuous Descent Operations Manual”.

Recent experience has proven the potential of new departure procedures known as Continuous Climb Operations (CCO). CCOs enable aircraft to climb in the most economical fashion, saving on emissions and costs but also providing a potential improvement in safety.


IFATCA Policy is:

  • CDA design and implementation should include as a minimum the 90% rule, the use of extensive simulation and the need for automated wind data and advanced sequencing tools.
  • Procedures’ terminology should refer to either Continuous Descent Arrivals (CDAs) or Optimized Profile Descents (OPDs).

IFATCA supports the development and implementation of Continuous Descent Operations and Continuous Climb Operations provided that:

  • Controllers are involved in the design.
  • Airspace is suited to the design.
  • The design meets the desired ATM capacity.
  • Tactical interventions are always possible.
  • Flight predictability is increased for both pilots and controllers.
  • Controller workload is not increased beyond an acceptable level.
  • It increases the overall performance of the ATM system without reducing safety.

See: Agenda B.5.9 – WP 95 – Amman 2011, Resolution B9 – WP 85 – Kathmandu 2012, Resolution B39 – WP 61 – Virtual 2022

 


 

 

Last Update: August 9, 2022  

November 4, 2019   760   Jean-Francois Lepage    ATS    

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