Abstract: A piloting assistance system for an aircraft comprises a flight management computer and a guidance computer. The flight management computer transmits speed setpoints to the guidance computer so as to pilot the aircraft in accordance with an initial speed profile or in accordance with an RTA speed profile following the reception of an RTA constraint. In response to the reception of a setpoint speed selected by a flight crew member in the presence of the RTA constraint, the guidance computer pilots the aircraft at the selected speed and the flight management computer determines a deselection point for returning to a predetermined speed profile while still complying with the RTA constraint. The guidance computer commands the display, on a navigation screen, of a symbol corresponding to the position of the deselection point.

Abstract: An automatic trajectory generation system bringing a flying aircraft from a current position to a destination which: obtains polygons representing obstacles potentially encountered, each polygon associated with an altitude layer; defines two first tangential circles relative to a current direction of the aircraft flight, centered on the right and the left, relative to the aircraft current position; defining two second circles tangential relative to a direction to be followed to destination, centered on the right and the left, relative to the georeferenced destination position; defines a third circle around vertices of the polygons; and searches for a flyable lateral trajectory between the aircraft current position and the destination by bypassing the polygons by the vertices in searching for tangential trajectories between the circles, by observing a pre-established vertical trajectory profile, as well as the lateral margin and a vertical margin with the polygons.

Abstract: A method for assisting in the piloting of an aircraft to observe a required time of arrival at a waypoint during a flight according to a predetermined flight plan comprising a nominal speed profile, comprising at least two flight segments, comprises the steps of determining an effective speed profile of the aircraft, and controlling by a guidance computer of the aircraft according to the effective speed profile. The step of determining an effective speed profile comprises the substeps of computing, for each segment of the nominal speed profile, a corrective term that is a function of a correction coefficient common to all the segments of the nominal speed profile, and computing, for each segment of the effective speed profile, a setpoint speed equal to the sum of a nominal speed of the nominal speed profile and of the corrective term.

Abstract: A piloting assistance system for an aircraft comprises a flight management computer and a guidance computer. The flight management computer transmits speed setpoints to the guidance computer so as to pilot the aircraft in accordance with an initial speed profile or in accordance with an RTA speed profile following the reception of an RTA constraint. In response to the reception of a setpoint speed selected by a flight crew member in the presence of the RTA constraint, the guidance computer pilots the aircraft at the selected speed and the flight management computer determines a deselection point for returning to a predetermined speed profile while still complying with the RTA constraint. The guidance computer commands the display, on a navigation screen, of a symbol corresponding to the position of the deselection point.

Abstract: A method for assisting in the piloting of an aircraft to observe a required time of arrival at a waypoint during a flight according to a predetermined flight plan comprising a nominal speed profile, comprising at least two flight segments, comprises the steps of determining an effective speed profile of the aircraft, and controlling by a guidance computer of the aircraft according to the effective speed profile. The step of determining an effective speed profile comprises the substeps of computing, for each segment of the nominal speed profile, a corrective term that is a function of a correction coefficient common to all the segments of the nominal speed profile, and computing, for each segment of the effective speed profile, a setpoint speed equal to the sum of a nominal speed of the nominal speed profile and of the corrective term.