Abstract: A system is provided for the centralized control of two groups of radiocommunications apparatus and two groups of radionavigational apparatus mounted on board an aircraft provided with two flight management computers, each of said flight management computers controlling the operation of the radionavigational apparatus of one of said groups. This system comprises two control devices dialoguing with each other respectively associated with said groups of radiocommunications apparatus and each including computing means, radiocommunications apparatus selection means, radionavigational apparatus selection means, frequency adjustment means and switching means. These two control devices are adapted for controlling the radiocommunications apparatus associated with the other, as well as the radionavigational apparatus associated with one of said flight management computers.