Aeronautical Fixed Telecommunication Network - Priority Indicators

Priority Indicators

Priority Indicators consist of two letters SS, DD, FF, GG and KK. They are assigned depending on the messages category as follows:

  • Priority Indicator SS for Distress Messages
  • Priority Indicator DD for Urgency Messages
  • Priority Indicator FF for Flight Safety Messages
  • Priority Indicator GG for Meteorological Messages, Flight Regularity Messages and Aeronautical Information Services Messages
  • Priority Indicator KK for Aeronautical Administrative Messages
  • Priority Indicator used for Service Messages are assigned as considered appropriate by the originator, but most likely KK is used

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