Changes to the indication of VHF channels in radiotelephony

What we have been informed

Amendment 80 to ICAO Annex 10, Volume II - Aeronautical Telecommunications - takes effect on 24 November 2005; It introduces a procedure for VHF communication channels to be indicated in 6 and 4 digits irrespective of whether 25 or 8.33 kHz channel spacing is used, e.g.:

  • 118,005 specified as "ONE ONE EIGHT DECIMAL ZERO ZERO FIVE"
  • 118,025 specified as "ONE ONE EIGHT DECIMAL ZERO TWO FIVE"
  • 118,100 specified as "ONE ONE EIGHT DECIMAL ONE"

Use of the term "CHANNEL" for 8.33 kHz channels is discontinued;

EUROCONTROL 8.33 kHz programme

  • The EUROCONTROL Agency has prepared the attached poster to increase awareness on a revised procedure for the indication of VHF channels in radiotelephony;
  • The widespread distribution and display of this poster, especially to flight crews and air traffic controllers, is strongly encouraged;

Further information

Further information is available at Eurocontrol R/T-procedures.


© European Organisation for Safety of Air Navigation (EUROCONTROL) November 2005. This alert is published by EUROCONTROL for information purposes. It may be copied in whole or in part, provided that EUROCONTROL is mentioned as the source and to the extent justified by the non-commercial use (not for sale). The information in this document may not be modified without prior written permission from EUROCONTROL. The use of the document is at the user’s sole risk and responsibility. EUROCONTROL expressly disclaim any and all warranties with respect to any content within the alert, express or implied.


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