ATS 3.29 CONTINUOUS DESCENT OPERATIONS (CDO) AND CONTINOUS CLIMB OPERATIONS (CCO)

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ATS 3.29 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”.


IFATCA Policy is:

IFATCA defines Continuous Descent Operations as: Continuous Descent Operations (CDO) are aircraft operating techniques facilitated by appropriate airspace and procedure design which meet all ATM requirements, allowing the execution of an optimized descent profile.


See: Resolution B9 – WP 85 – Kathmandu 2012

IFATCA Policy is:

Doc 9931 should be amended as follows:

  • Incorporate CDA design practices learned by the pioneers of the continuous descent, including the 90% rule, the use of extensive simulation and the need for automated wind data and advanced sequencing tools.
  • More precisely refer to those procedures it aims to regulate as either Continuous Descent Arrivals (CDAs) or Optimized Profile Descents (OPDs).

See: Agenda B.5.9 – WP 95 – Amman 2011

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:

IFATCA defines Continuous Climb Operations as: Continuous Climb Operations (CCO) are aircraft operating techniques facilitated by appropriate airspace and procedure design which meet all ATM requirements, allowing the execution of an optimized climb profile.


See: Resolution B8 – WP 85 – Kathmandu 2012

IFATCA Policy is:

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: Resolution B9 – WP 85 – Kathmandu 2012

 

Last Update: October 2, 2020  

November 4, 2019   357   Jean-Francois Lepage    ATS    

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