AA radar AFC AFC mixer CRT CW oscillator MAD radar Navaglobe Oboe TR switch TR unit VAR Volscan altimeter amplifier analyzer astronavigation automatic electronic navigation automation avionics cascade screen cathode-ray tube celestial navigation chronometer coastwise navigation consolan dead reckoning demodulator detector discriminator early-warning radar electron microscopy electron optics electron physics electronic engineering electronic navigation electronics electrophysics fix frequency meter gun-directing radar hard-tube pulser indicator interception radar limiter line of position local oscillator long-range radar loran magnetron microwave mixer mixer modulator navar navigation network pulser omnidirectional range omnirange oscillator overlapping panoramic radar photoelectricity pilotage plane sailing point-to-point navigation potentiometer pulse generator radar telescope radio radio beacon radio navigation radionics range-sweep amplifier range-sweep generator receiver screen second detector sextant shoran sofar sonar square-wave generator synchronizer tables tacan teleran television timing unit tracker transistor physics transmitter trigatron visual-aural range