A cold cathode gas discharge lamp having a ring of radially directed cathode elements on an electrically insulating substrate underlying a pair of concentric transparent ring anodes of different diameter for displaying aircraft heading and aircraft bearing (with respect to ground radio transmitters), respectively. Additional cathode elements are placed inside the aforesaid cathode rings on the same substrate underlying a third transparent anode for the display of alpha-numeric (distance) and annunciator data. Selected ones of the cathodes and anodes are energized to cause localized glow discharges viewable through the anodes for representing desired data.