The device (405) for behavior simulation of a radio navigation system, without the latter being installed on an aircraft, comprising a means (410) for determining a position of the aircraft, characterized in that it further comprises: a means (415) for automatically determining at least one radio navigation beacon of a station on the ground depending on said position of the aircraft, and for selecting a radio navigation beacon of an automatically determined station on the ground, a means (420) for calculating at least one physical quantity value linked to the relative position of the aircraft relative to the selected beacon and a means (425) for presenting, on a display means of the aircraft cockpit, each calculated physical quantity value and the identifier of the selected beacon.