glide slope, radiosonde, manometer, inclinometer, tachometers, pitot, pitot tube, dropsonde, gyrocompass, sonde, ailerons, airspeed, galvanometer, inertial navigation, gradiometer, totalizer, vernier, pyrometer, radiometer, inertial navigation system, airfoils, annunciator, multimeter, radome, inertial guidance, photometer, sensors, groundspeed, aneroid, thermistor, underwing, tachymeter, theodolites, drogue, illuminance, elint, nvis, unairworthy, dosimeter, photocells, hygrometer, sounders, doppler, avionics, weather radar, azimuthal, bolometer, readouts, strain gauge, ammeter, calibration, voltmeter, emissivity, sciamachy, measurements, goniometer, retroreflector, gages, rotor shaft, nosewheel, doppler shift, spectroscope, gauges, reflectometer, notam, gimbals, direction finder, cartesian coordinates, microbalance, klystron, circular polarization, periscopes, echo sounder, fluorometer, cockpit, handwheel, spectro, geosynchronous, sextants, directional antenna, turbojet, radars, telemeter, refractometer, turboshaft, odometry, loran, electrocardiography, windblast, voltage divider, transponder, cardiograph, datums, galvo, potentiometer, correctors, oximeter, gliders, manpad, spectrographic, hydrophone, comint, altimeter, cameras, receivers, spectrometers, machines, magnetometers, manometers, radiometers, recorders, synthesizers, thermostats, analyzers, detectors, encoders, oscilloscopes, repeaters, telephones, tuners, analysers