Method of and device for displaying information representing speed ranges on an aircraft

The method involves determining a current incidence of an aircraft, and defining a longitudinal scale (10) that depends on a current aerodynamic configuration of the aircraft. The longitudinal scale is presented on a visual display unit, where the scale is longitudinally moved with respect to the current incidence of the aircraft that is illustrated by a characteristic sign (15) fixed on the display unit. An independent claim is also included for an indication device for indicating a speed of an aircraft.