Patent ID: 8321068

Claim:
A method of plotting a trajectory portion for an aircraft crew use, using flight management system of an aircraft, linking a known position of the aircraft to a point in space, denoted the “exit point”, comprising the steps of: defining a circular arc of a circle, a centre of the circle is a point extracted from a navigation database whose coordinates are known, the arc comprising two ends of known coordinates, one end of which is the exit point; determining a position of a transition point situated on the arc, the transition point being a real point of entry to the circular arc of the trajectory portion by the aircraft, the transition point being charted with respect to the position of the centre of the circle comprising the circular arc, and a length of the arc calculated based on a theoretical entry point; automatically plotting of the trajectory by the flight management system of the aircraft, and said trajectory successively linking the known position of the aircraft, the transition point and the exit point, wherein the known position of the aircraft is the theoretical entry point which is different from the transition point on the arc.