AIRPORT SYSTEMS INTERNATIONAL, INC.

localizers, glide slope indicators, marker radio beacons, non-directional radio beacons, very high frequency omni-range transmitters, doppler very high frequency omnidirectional range 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 electrical power supplies, meters and computers for performing in-flight evaluations of ground-based navigational transmitters, digital radio telemetering theodolite transmitters and receivers, all for aircraft navigation primarily with respect to airports