The WG is intended to provide guidance to ensure that the radio frequency (RF) characteristics of aeronautical Communications, Navigation and Surveillance (CNS) systems use the spectrum efficiently while respecting the necessary safety margins. The guidance is intended to facilitate any future evaluation of compatibility with other systems and ensure that the usage of the allocated spectrum is as efficient as possible, fully taking into account the specificities of aeronautical CNS systems. The deliverables are envisaged to be referenced by EASA, other CAAs, ICAO, and national/international spectrum regulators, as appropriate, in guidance material for aviation systems.

In doing so, WG-124 is tasked to:
•maintain close relationship with ICAO FSMP and ICNSS task force
•Work jointly with RTCA SC-242 to ensure consistency between EUROCAE and RTCA standards related to spectrum;
•provide background information on aerospace industry constraints to other spectrum users.
•develop and maintain close relationship with European and international aviation and spectrum agencies.