In one aspect, the flight display system comprises a navigation map that includes a time window for a required time of arrival (RTA) waypoint. The time window has a proximal end indicating the aircraft's position at the RTA using a defined lowest speed and a distal end indicating the aircraft's position...http://www.google.de/patents/US7765061?utm_source=gb-gplus-sharePatent US7765061 - Flight display system with enhanced temporal depiction of navigation information
