Guidance method and system for assisting in following a trajectory for velocity-vector piloting of an aircraft

A system for guidance and for assisting in following a trajectory for velocity-vector piloting of an aircraft, comprising:

• a flight management system of the aircraft, a set of positioning and attitude sensors of the aircraft, a set of at least one display including a piloting screen of the aircraft, and a guidance computer for assisting manual piloting of the aircraft;
• the flight management system being configured so as to determine and provide a target trajectory of the aircraft;
• the set of position and attitude sensors being configured so as to provide kinematics of the aircraft to the guidance computer at all times;
• the guidance computer being configured so as to calculate, at all times, lateral and vertical offsets of a current position of the aircraft from the target trajectory, a joining heading and a joining gradient for the aircraft to join the target trajectory from the current position of the aircraft and the target trajectory;
• the piloting screen showing a velocity vector being configured so as to display a consistent guidance symbol, centered on the calculated joining heading and calculated joining gradient for joining the target trajectory;
• the system being wherein the target trajectory of the aircraft has one or more trajectory breaks from one or more of a set formed by:
• a start of a turn, an end of a turn, a turn radius, a direction change, a gradient change, and a lateral heading change;
• the guidance computer is configured so as to calculate the remaining time before the next break, and
• the control screen is configured so as to display, in addition to the guidance symbol:
• first information anticipating a next trajectory break with regard to the remaining time until the next trajectory break calculated when the calculated remaining time passes a value less than a predetermined period T;
• and/or
• second information anticipating the next trajectory break with regard to the direction of displacement of the guidance symbol after the next trajectory break when the calculated remaining time passes a value less than the predetermined period T;
• and/or
• third information anticipating the next trajectory break with regard to the displacement velocity of the guidance symbol after the next trajectory break when the calculated remaining time passes a value less than the predetermined period T;
• and/or
• fourth information anticipating the next trajectory break with regard to the gradient to be taken after the next trajectory break when the calculated remaining time passes a value less than the predetermined period T.