A device for the coherent management of data deriving from different surveillance systems of an aircraft includes: a flight management system, the function of which is to assist the crew in following a flight plan of the aircraft and an associated trajectory; a surveillance system, the function of which is to detect any obstacles in proximity to the aircraft; a warning management system, the function of which is to detect abnormal situations and to display for the crew, where appropriate, warnings, such as potentially critical alarms or non-critical alerts, and the associated procedures to be followed when such exist; in which said flight management system, said surveillance system and said warning management system are interconnected and cooperate so that at least the warning management system has access to the flight plan of the aircraft, and is configured to display for the crew a summary of the situation when the surveillance system detects an obstacle that the aircraft should avoid according to the flight plan, and to not display, consequently, unnecessary warnings.