electronic units for detecting and identifying aircraft and vehicles, signal processors, electro-optic and electronic countermeasures units, aircraft components; namely, aircraft navigation electronics, engine control units, electrical power converters and controllers; hybrid microcircuits, ice detectors, optical communications units, radar warning electronics, and utility management units; namely, systems which continuously monitor equipment and controls and compare the results to predetermined management parameters; stabilized sights for helicopters; telecommunications units; namely, telephones, digital exchanges, facsimile units, terminals, intercoms and recorders; acoustic flowmeters, platform transmitter terminals, sub-bottom profiler, pingers, transponders, acoustic underwater tracking and positioning sensors; automatic manufacturing units; namely, systems which continuously monitor equipment and controls and compare the results to predetermined manufacturing plans, electron beam welding units, fusion arc welding units, laser welding and cutting units, resistance welding units, welding controls; fuel dispensing units, satellite communication units, training simulators, energy management and control units; namely, systems which continuously monitor the energy consumption of a plant or equipment and control the monitored consumption to accord to predetermined energy-consumption plans or forecasts; submarine performance and analysis units, submarine platform controllers, precision hydraulic units for the control and guidance of subsea vessels; and commercial instruments; namely, disturbance recorders, fault recorders and viscometers