Abstract: A system for sequencing traffic for use with various types of vehicles such as air vehicles, land vehicles water vehicles, and railroad vehicles. Virtual containers may be generated that are used to sequence traffic. The virtual containers may be suitably managed to move at a predetermined rate and capacity. Vehicles may be positioned within an empty virtual container. The vehicle will then be managed to stay within the boundaries of the virtual container and thus maintain the desired sequencing of traffic.

Abstract: A fail safe GPS system for an aircraft moving along a desired trajectory within vertical and horizontal limits using first and second redundant GPS receivers a first of which is connected to the avionics equipment of the aircraft and to an alarm and the second of which is connected only to the alarm so that if a malfunction in the flight management system occurs both GPS's will cause the alarm and if a malfunction in the first GPS system occurs, so that the aircraft exceeds the vertical or horizontal limits, the second GPS system will cause the alarm.