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  2. VHF omnidirectional range - Wikipedia

    en.wikipedia.org/wiki/VHF_omnidirectional_range

    Developed from earlier Visual Aural Radio Range (VAR) systems. The VOR development was part of a U.S. civil/military program for Aeronautical Navigation Aids. [2] In 1949 VOR for the azimuth/bearing of an aircraft to/from a VOR installation and UHF DME (1950) [3] and the first ICAO Distance Measuring Equipment standard, [4] were put in operation by the U.S. CAA (Civil Aeronautics Administration).

  3. VOR/DME - Wikipedia

    en.wikipedia.org/wiki/VOR/DME

    In radio navigation, a VOR/DME is a radio beacon that combines a VHF omnidirectional range (VOR) with a distance-measuring equipment (DME). [1] The VOR allows the receiver to measure its bearing to or from the beacon, while the DME provides the slant distance between the receiver and the station.

  4. Omnidirectional antenna - Wikipedia

    en.wikipedia.org/wiki/Omnidirectional_antenna

    Vertical polarized VHF-UHF biconical antenna 170–1100 MHz with omnidirectional H-plane pattern. Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis.

  5. Radio navigation - Wikipedia

    en.wikipedia.org/wiki/Radio_navigation

    VHF omnidirectional range, or VOR, is an implementation of the reverse-RDF system, but one that is more accurate and able to be completely automated. [ citation needed ] The VOR station transmits two audio signals on a VHF carrier – one is Morse code at 1020 Hz to identify the station, the other is a continuous 9960 Hz audio modulated at 30 ...

  6. Very high frequency - Wikipedia

    en.wikipedia.org/wiki/Very_high_frequency

    Very high frequency (VHF) is the ITU designation [1] for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency ...

  7. Non-directional beacon - Wikipedia

    en.wikipedia.org/wiki/Non-directional_beacon

    The formula to determine the compass heading to an NDB station (in a no wind situation) is to take the relative bearing between the aircraft and the station, and add the magnetic heading of the aircraft; if the total is greater than 360 degrees, then 360 must be subtracted. This gives the magnetic bearing that must be flown: (RB + MH) mod 360 = MB.

  8. Seeing the number 1212 everywhere? Here's what it might mean

    www.aol.com/seeing-number-1212-everywhere-heres...

    Depending on where you are in your life, this might resonate in a range of ways, but the gist is trusting yourself along the journey. Sidhharrth S Kumaar, an astro numerologist at NumroVani, tells ...

  9. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    Radiotriangulation scheme using two direction-finding antennas (A and B) Direction finding antenna near the city of Lucerne, Switzerland Direction finding (DF), or radio direction finding (RDF), is the use of radio waves to determine the direction to a radio source.