Patent ID: 8295996

Claim:
A method for limiting alerts emitted by an anticollision system on board an airplane which performs a change-of-altitude maneuver, wherein the change-of-altitude maneuver of the airplane is carried out during a flight trajectory of the airplane in which the flight trajectory comprises an approach phase followed by a capture phase, with the flight trajectory having a setpoint altitude (Zc) and the capture phase having a predetermined setpoint execution deadline, the method comprising the steps of: detecting, by said anticollision system, an intruder aircraft situated in an aerial environment of said airplane; calculating a theoretical time for collision between said airplane and said intruder aircraft; and emitting at least one alert when the calculated theoretical collision time is less than a predetermined threshold, wherein the following steps are additionally carried out by an alert limiting device: A) determining a minimum execution deadline (dmin) and a maximum execution deadline (dmax) of said capture phase, said minimum execution deadline (dmin) being greater than said predetermined setpoint execution deadline; B) calculating at least one modified vertical speed profile of said altitude capture phase, wherein the at least one modified speed profile provides for a flight duration (dcap) in the altitude capture phase of the flight trajectory that is between said minimum (dmin) and maximum (dmax) execution deadlines; C) triggering, when said airplane is in the approach phase, said capture phase; and D) controlling, after said capture phase is triggered, vertical speed of said airplane according to said calculated modified vertical speed profile.