COM 4.5 RTF FREQUENCY USAGE

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COM 4.5 RTF FREQUENCY USAGE

Other means of communication are currently being developed and implemented, e.g. Controller to Pilot Datalink Communications (CPDLC). However, this technology is currently not being used in airspace with many time-critical clearances and communications. The current systems are too limited to deal with environments in which the majority of clearances are time-critical, mainly because of response times. It is therefore very likely that RTF communications will be the sole or major means of communications in many areas in the world. New requirements are listed that TOC believes all controllers should be provided with, while providing ATS.


IFATCA Policy is:

If a controller is providing ATS for two or more areas, the relevant channels must be located on the Controller Working Position being used.

If more than one RTF channel is being used, then suitable ‘retransmit’ facilities must be provided to enable all users to receive all transmissions. The ability to enable or disable ‘retransmit’ facilities should be provided.

Future systems should include technology that warns the controller in the event of a crossed transmission.

Independent backup equipment should be provided.

Communications with aircraft should only be undertaken within the Designated Operational Coverage (DOC) for the frequency being used.

Voice switch systems must include facilities to:

  • mute individual frequencies (due to open microphone, etc. problems) which will also cancel the retransmit for that frequency;
  • present equipment failure alarms and provide the ability to isolate equipment which has failed;
  • select secondary equipment (i.e. receivers, transmitters and paths) at the Controller Working Position;
  • indicate the frequency on which the last incoming call was made.

See: WP 17 – Brussels 1979 and WP 88 – Melbourne 2005

IFATCA Policy is:

IFATCA recognises the need for, and supports the reduction of voice communication workload of controllers. However simply omitting items without alternative methods of accomplishing essential checks compromises safety.


See: Resolution BC4 – WP 86 – Punta Cana 2010

 

Last Update: September 29, 2020  

November 5, 2019   207   Jean-Francois Lepage    COM    

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