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

'/i':40 'ad':29 'ads-b':28 'aid':7 'air':1,53,65 'automat':31 'b':30 'base':5,57,69 'broadcast':35 'comput':48,60 'control':3,55,67 'depend':32 'direct':18 'distanc':11 'dme':10 'doppler':15 'download':47 'dvor':14 'equip':13 'hardwar':8 'il':20 'instrument':21,26 'integr':41 'land':4,22,56,68 'measur':12 'mode':44 'name':9 'navig':6,58,70 'omni':17 'pir':24 'precis':25 'radar':46 'rang':19 'record':59 'runway':27 'secondari':42 'sir':38 'sir-':37 'softwar':49,61 'surveil':34,43 'surveillance-broadcast':33 'system':23 'traffic':2,54,66 'use':51,63 'vhf':16

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