| 摘要 |
The device ( 1 ) comprises first means ( 2 ) for defining a main trajectory, which is followed by the aircraft, and an optional trajectory which deviates from the main trajectory, which exhibits at least one common point shared with said main trajectory and which is able to be followed by the aircraft if said trajectory is activated, second means ( 3 ) for automatically determining a decision point which indicates the last position of the aircraft along the main trajectory, where the optional trajectory can still be activated so as to allow the aircraft to follow it, third means ( 6 ) for automatically presenting the decision point to a pilot of the aircraft, and fourth means ( 9 ) which are actuatable, allowing a pilot to activate said optional trajectory.
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