Flight control indicator determining the maximum slope for the flight control of an aircraft by terrain following

A flight control indicator for an aircraft, said flight control indicator comprising:

• a set of information sources;
• a computation unit which is connected to said set of information sources;
• and
• a display device which comprises a display screen and which is connected to said computation unit,
• wherein
• said computation unit determines, on the basis of information emanating from said set of information sources, at least one maximum total slope of the aircraft, which corresponds to the maximum thrust and is obtained on the basis of the measurement of the current performance of the aircraft, extrapolated to the condition of maximum slope and anticipating an engine fault;
• and
• said display device is a head-up display device and presents, on the display screen, at least one indicator which indicates said maximum total slope and which is presented superimposed on the environment existing in front of the aircraft.