SELEX ES

Air traffic control land based navigation aids hardware, namely, DME (Distance Measuring Equipment), DVOR (Doppler VHF Omni Directional Range), ILS (Instrument Landing System), PIR (Precision Instrument Runway), ADS-B (Automatic Dependent Surveillance-Broadcast) and SIR-S/I (Integrated Secondary Surveillance Mode S Radar); downloadable computer software for use in air traffic control land based navigation; recorded computer software for use in air traffic control land based navigation