Human-machine interface for supporting a pilot when taking off or landing an aircraft in reduced visibility, a plurality of graphics layers being superimposed on a single display device: - a hovering flight layer for the combined display of the ground speed, of the direction of the instantaneous direction of movement or of drift in relation to the helicopter longitudinal axis, and of the altitude above ground which includes as graphics elements a jet-type drift indicator of variable direction and length, whose length and direction correspond to the absolute value and the direction of the speed of movement or of drift, and concentric circles whose diameter corresponds to fixed absolute values of the speed of movement or of drift, and whose centre corresponds to the zero point of the drift indicator, a marking for the forward direction being arranged on the outer circle, and - a 3D scenes layer, which displays a three-dimensional, temporally correct and positionally accurate image of the real surroundings in the direction of the flight path of the helicopter, and which is continuously updated with the instantaneous flight state data and the instantaneous height above ground, characterized in that - present as further graphics layer is a base layer in the form of a flat base surface which symbolizes an idealized ground surface, calculated only on the basis of the instantaneous value of the altitude above ground and the instantaneous flight attitude data, the base surface being bounded by an artificial horizon and being continuously updated with the instantaneous flight state data and the instantaneous height above ground, - as further graphics element, the hovering flight layer includes a height indicator in the form of a circular arc of variable arc length, which emanates from a fixed minimum value marking and whose arc length corresponds to the height of the helicopter above ground, the circular arc of the height indicator being arranged concentrically in relation to the concentric circles for the display of the speed of movement or of drift. - a hovering flight layer for the combined display of the ground speed, of the direction of the instantaneous direction of movement or of drift in relation to the helicopter longitudinal axis, and of the altitude above ground which includes as graphics elements a jet-type drift indicator of variable direction and length, whose length and direction correspond to the absolute value and the direction of the speed of movement or of drift, and concentric circles whose diameter corresponds to fixed absolute values of the speed of movement or of drift, and whose centre corresponds to the zero point of the drift indicator, a marking for the forward direction being arranged on the outer circle, and - a 3D scenes layer, which displays a three-dimensional, temporally correct and positionally accurate image of the real surroundings in the direction of the flight path of the helicopter, and which is continuously updated with the instantaneous flight state data and the instantaneous height above ground, characterized in that - present as further graphics layer is a base layer in the form of a flat base surface which symbolizes an idealized ground surface, calculated only on the basis of the instantaneous value of the altitude above ground and the instantaneous flight attitude data, the base surface being bounded by an artificial horizon and being continuously updated with the instantaneous flight state data and the instantaneous height above ground, - as further graphics element, the hovering flight layer includes a height indicator in the form of a circular arc of variable arc length, which emanates from a fixed minimum value marking and whose arc length corresponds to the height of the helicopter above ground, the circular arc of the height indicator being arranged concentrically in relation to the concentric circles for the display of the speed of movement or of drift.