Abstract: A method and device for detecting a risk of collision of an aircraft, having a profile unit having knowledge of the terrain profile, a determination unit for determining effective values of particular flight parameters, a checking unit for verifying whether a flight path determined by the effective values is compatible with the terrain profile, and a transmitting unit for emitting a warning signal in case of incompatibility. The checking unit includes at least one element for calculating a height variation due to an energy transfer and a total slope variation generated by a speed reduction, during an evasive action, an element deter mining an evasive course using the height variation, and an element verifying whether the evasive course determined is compatible with the terrain profile.

Abstract: The invention concerns a device (1) comprising means (5) having knowledge of the terrain profile, means (7) for determining effective values of particular flight parameters, checking means for (9) for verifying whether a flight path determined by means of said effective values is compatible with the terrain profile, and means (13) for emitting a warning signal in case of incompatibility, said checking means (9) including at least one element (15) for calculating a height variation due to an energy transfer and to a total slope variation generated by a speed reduction, during an evasive action, an element (16) determining an evasive course using said height variation, and an element (3) verifying whether the evasive course thus determined is compatible with the terrain profile.