ASI

LOCALIZERS, GLIDE SLOPE INDICATORS, MARKER BEACONS, NON-DIRECTIONAL BEACONS, VHF OMNI-RANGE TRANSMITTERS, DOPPLER VOR TRANSMITTERS, PORTABLE INSTRUMENT LANDING RECEIVERS AND SIGNAL ANALYZERS, DISTANCE MEASURING TRANSMITTERS AND RECEIVERS FOR MEASURING THE SLANT RANGE DISTANCES OF AIRCRAFT FROM NAVIGATIONAL TRANSMITTERS, KITS CONSISTING PRIMARILY OF SOLID-STATE TRANSMITTERS, RF GENERATORS, AMPLIFIERS AND POWER SUPPLIES, METERS, AVIONICS AND COMPUTERS FOR PERFORMING IN-FLIGHT EVALUATIONS OF GROUND-BASED NAVIGATIONAL TRANSMITTERS, DIGITAL RADIO TELEMETERING THEODOLITE TRANSMITTERS AND RECEIVERS, FOR AIRCRAFT NAVIGATION PRIMARILY WITH RESPECT TO AIRPORTS