Reminder – 121.6MHz conversion to 8.33 kHz VHF voice channel spacing

By 1st January 2026 any remaining exemptions to conversion to 8.33kHz spacing expire, this includes 121.6MHz, the channel used by Aerodrome Rescue & Fire Fighting Services (RFFS). This means that all ground radios and RFFS appliance radios will need to be upgraded have 8.33kHz capability. Aerodromes are encouraged to plan for conversion of this channel to 121.605.

As this is a change to the functional system, the Aerodrome Operator and ANSP should ensure the change is processed using their SMS and ANSP approved Change Management Procedures. An SRG1430 should be submitted to asddocs@caa.co.uk.

For further details contact spectrum@caa.co.uk.