Current SELCAL 32 Progress

Standards Work

Both the Airline Electronic Engineering Committee (AEEC), and Radio Technical Commission for Aeronautics (RTCA) standards for SELCAL avionics were completed in 2016.  The SELCAL 32 proposal is now in final approval process by the ICAO Communications Panel (CP) for inclusion in ICAO’s Standards and Recommended Practices (SARPs).  During its October 2016 meeting, the ICAO CP proposed a regional implementation to ensure all FIRs are updated in a coordinated manner.

Technical details of SELCAL operation can be found in the following references:

  • ICAO SARPS, Vol. V
  • RTCA DO-93A
  • ARINC A714A

ANSP Solutions

 To implement the new SELCAL tones in ANSP ground stations, several options are available:

  • Contact SELCAL encoder supplier to include the extra tones in the existing encoder
  • Install a new PC based encoder
  • Upgrade HF transmitters to include a new encoder with the additional tones