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radio frequency indicator

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  • Radio Electronic Token Block — is a system of railway signalling used in the United Kingdom. It is a development of the physical token system for controlling traffic on single lines. How it works On arrival at a token exchange point , the driver reports his/her position to the …   Wikipedia

  • Radio direction finder — Civil Air Patrol members practice using a handheld radio direction finder to locate an emergency locator transmitter …   Wikipedia

  • Radio clock — A radio clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. Such a clock may be synchronized to the time sent by a single transmitter, such as… …   Wikipedia

  • radio altimeter — Altimeters employing radio waves to measure the height of the aircraft above the surface. The frequency of the transmitted and received signal is the same but the transmitted frequency is continuously changed. The time difference between the… …   Aviation dictionary

  • Two-way radio — receiver which only receives content. Two way radios are available in mobile, stationary base and hand held portable configurations. Hand held radios are often called walkie talkies or handie talkies. A push to talk or Press To Transmit button is …   Wikipedia

  • Mobile radio — This article is about professional equipment. For mobile radios used in amateur radio, see amateur radio mobile operation. Mobile radio or mobiles refer to wireless communications systems and devices which are based on radio frequencies, and… …   Wikipedia

  • omnibearing indicator — An indicator that gives bearing information by a pointer rotating over a fixed compass card or a rotating card against a fixed datum. VOR (very high frequency omnidirectional radio range) bearings are magnetic bearings on an OBI, whereas the… …   Aviation dictionary

  • course deviation indicator — An indicator used with VOR (very high frequency omnidirectional radio range), LORAN (long range navigation), GPS (global positioning system), or other area navigation systems to indicate the direction and relative amount of deviation from the… …   Aviation dictionary

  • To-From indicator — An indicator used in aerial navigation with the VOR (very high frequency omnidirectional radio range) system. The To From indicator shows the pilot if the aircraft is flying toward or away from the station it is flying at in the heading shown on… …   Aviation dictionary

  • visual-aural (radio) range — ☆ visual aural (radio) range or visual aural range [vizh′o͞oəlôr′əl ] n. a radio range that sends out signals as an aid to air navigation; esp., a very high frequency range that beams four signals, two for reception by the ear and two for viewing …   Universalium

  • visual-aural (radio) range — ☆ visual aural (radio) range or visual aural range [vizh′o͞oəlôr′əl ] n. a radio range that sends out signals as an aid to air navigation; esp., a very high frequency range that beams four signals, two for reception by the ear and two for viewing …   English World dictionary

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