METHOD AND DEVICE FOR ASSISTING THE PILOTING OF AN AIRCRAFT WITH A HEAD-UP DISPLAY

The present invention relates to a method for assisting in the piloting of an aircraft (1) comprising a head-up display (30) and an autopilot system (20) which comprises a human-machine selection interface (20) for choosing an operating mode from among several predetermined operating modes comprising a disengaged mode and an engaged mode, the autopilot system (20) being configured in the engaged mode to control at least one actuator (25) in order to make a current value of a controlled parameter (PAR) tend towards a set value. The method comprises: i) detection with a control system (40) of a current mode applied among said several predetermined operating modes, ii) commanding and displaying on the head-up display (30) a symbol carrying said current value according to a graphic charter specific to the current mode, a first graphic charter applied during the disengaged mode being different from a second graphic charter applied during the engaged mode.