The RTA function enables an aircraft to pass a waypoint at a predefined time. The CTA concept uses this capability in sequencing arriving traffic to the Terminal Area (TMA) by assigning such fix times to aircraft. CTA and RTA are considered by the industry to be the first step towards full 4 Dimension (4D) Trajectory Based Operations (TBO).

IFATCA Policy is:

IFATCA supports the Controlled Time of Arrival concept provided;

  • Arrival Manager (AMAN) is available to define reliable CTA times.
  • RTA equipage level of aircraft is sufficient to support CTA operations.
  • Procedures and controller tools are available to integrate RTA equipped and non- 
equipped aircraft in the same traffic stream.
  • Tactical ATC interventions are always possible.
  • Accurate wind and temperature data is available.
  • Means to communicate the CTA contract with aircraft are available (preferably 
data link).
See: Resolution B2 – WP 84 – Kathmandu 2012

 

Last Update: 20th July 2022
4th November 2019 893 Jean-Francois LepageATSATS , TPM , ATM Operations , Flight Operations , TOC

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Jean-Francois Lepage

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