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belgium caa logo Belgium: Frequency monitoring code (FMC) 5101 from 7 September 2023

Belgium are introducing a single frequecny monitoring code (FMC) from 7 Septmeber 2023 for any pilot of mode S equipped aircraft within the Belgian FIR (Luxembourg excluded) in Class G airspace and not requesting flight information service, but willing to keep situational awareness of what’s happening on the frequency while being reachable.

Pilots are encouraged to use a FMC when they are flying outside controlled airspace, (e.g. below Brussels TMA), in order to increase situational awareness and help to avoid infringements.

The transponder code will be displayed on the situation display, implying the pilot is monitoring the FIC frequency and can then hear transmissions. There is no requirement for the pilot to contact the FISO when the FMC is selected, however, it is important that the pilot reverts to the conspicuity code when leaving the Belgian FIR ( Luxembourg excluded ) or changing frequency/intentions.

FMC can reduce cockpit workload, allowing the pilot to concentrate on the ‘aviate and navigate’ job which also reduces the FISO’s workload. It also provides reassurance to the pilot that in the event of an emergency, a call to the FIS unit can be made immediately.

In the event of a pilot likely to infringe controlled airspace the FMC permits the FISO to conduct a ‘blind transmission’ with the knowledge that the pilot is ‘listening-out’. In addition, aircraft equipped with mode S transponder allow the use of the call-sign in the blind transmission, leading to a much faster resolution. The use of a FMC does not replace contacting the local ATS unit when required and appropriate, but it is a good alternative when flying in uncontrolled airspace.

A squawk does not imply that a pilot is receiving an air traffic service, nor that they are cleared to enter controlled airspace.

Full information can be downloaded here.