Patent ID: 7089091

Claim:
A method of revision for carrying out a lateral revision of a current flight plan of an aircraft, comprising at least waypoints that the aircraft must overfly, said aircraft flying along a low altitude flight trajectory allowing said aircraft to follow as closely as possible the terrain overflown, in which method: a) determining an auxiliary flight plan corresponding to a lateral revision of said current flight plan over a low altitude flight section, said lateral revision entailing the taking into account of a new terrain to be overflown; b) determining automatically at least one decision point which indicates the last position of the aircraft along said current flight plan, where said auxiliary flight plan can still be activated, so as to allow the aircraft to overfly said new terrain in complete safety by following said auxiliary flight plan, and to do so under the same flight conditions as those envisaged for said current flight plan; c) presenting automatically at least said decision point to a pilot of the aircraft wherein the pilot can, at least as a function of this presentation, activate said auxiliary flight plan so as to carry out the lateral revision of the current flight plan.