The guidance system (1) comprises a first means (2) for guiding the aircraft while maintaining a spacing with another aircraft, a second means (3) for making the aircraft pass through a particular waypoint at a required passing time, and means (5) for selecting automatically one of said first and second...http://www.google.de/patents/US8112224?utm_source=gb-gplus-sharePatent US8112224 - Guidance system for an aircraft
