Described is a heads-up display system for an aircraft having a rotating
propeller within view of at least one occupant of the aircraft. The
heads-up display system comprises a plurality of light-emitting elements
disposed on a side of a propeller blade substantially facing at least one
occupant of the aircraft. A graphics generator turns one or more of the
light-emitting elements on the side of the propeller blade on and off in
accordance with the rotation of the propeller to produce a graphical
image that appears to at least one occupant of the aircraft to be
superimposed on a background. The graphical image can be produced to
conform to an object in the background upon which the graphical image is
superimposed.