Patent ID: 8306678

Claim:
A method of filtering anti-collision alerts for an aircraft, the aircraft having a terrain anti-collision equipment configured to transmit alerts to an alarm manager of the aircraft through an alert filter, the alerts each possessing a coding corresponding to one of at least three danger levels including: a first level corresponding to a low risk of dangerousness indicating a presence, in proximity to the aircraft, of obstacles not constituting an immediate danger; a second level corresponding to a more significant dangerousness level advising gaining altitude for the aircraft within a given time span; and a third level corresponding to a high risk of dangerousness advising undertaking an action other than the action corresponding to the second level, the method comprising: evaluating a situation of the aircraft; determining if a corridor defined along a predefined ideal trajectory is crossed by the aircraft according to the result of the evaluation; after it is determined that the corridor is not crossed, selectively filtering out alerts of the first level and the second level by the alert filter according to multiple criteria transmitted by various systems for navigation, guidance, or positioning of the aircraft and allowing transmission of alerts of the third level and unfiltered alerts of the first level and the second level to the alarm manager of the aircraft; and after it is determined that the corridor is crossed, disabling the filtering and allowing transmission of all alerts to the alarm manager of the aircraft.