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  2. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...

  3. Doppler radio direction finding - Wikipedia

    en.wikipedia.org/wiki/Doppler_radio_direction...

    Doppler radio direction finding, also known as Doppler DF, is a radio direction finding method that generates accurate bearing information with a minimum of electronics. It is best suited to VHF and UHF frequencies and takes only a short time to indicate a direction. This makes it suitable for measuring the location of the vast majority of ...

  4. List of FIFA country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_FIFA_country_codes

    FIFA assigns a three-letter country code (more properly termed a trigram or trigraph) to each of its member and non-member countries.These are the official codes used by FIFA and its continental confederations (AFC, CAF, CONCACAF, CONMEBOL, OFC and UEFA) as name abbreviations of countries and dependent areas, in official competitions.

  5. Automatic direction finder - Wikipedia

    en.wikipedia.org/wiki/Radio_Magnetic_Indicator

    An automatic direction finder ( ADF) is a marine or aircraft radio-navigation instrument that automatically and continuously displays the relative bearing from the ship or aircraft to a suitable radio station. [3] [4] ADF receivers are normally tuned to aviation or marine NDBs ( Non-Directional Beacon) operating in the LW band between 190 ...

  6. Finder (software) - Wikipedia

    en.wikipedia.org/wiki/Finder_(software)

    The Finder is the default file manager and graphical user interface shell used on all Macintosh operating systems. Described in its "About" window as "The Macintosh Desktop Experience", it is responsible for the launching of other applications, and for the overall user management of files, disks, and network volumes.

  7. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  8. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    In Electrical Power Systems and Industrial Automation, ANSI Device Numbers can be used to identify equipment and devices in a system such as relays, circuit breakers, or instruments. The device numbers are enumerated in ANSI/ IEEE Standard C37.2 "Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations" .

  9. Cleetus McFarland - Wikipedia

    en.wikipedia.org/wiki/Cleetus_McFarland

    1. Poles. 0. Best finish. 9th in 2022. Finished last season. 9th ( 2022) Last updated on: November 14, 2022. Lawrence Garrett Mitchell [1] (born April 5, 1995), known professionally as Cleetus McFarland, is an American racing driver, car enthusiast, amateur airplane and helicopter pilot, RC pilot, and YouTube content creator.

  10. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    List of dialling codes [ edit] Short codes. 02x yyyy yyyy [eight-digit local number] 011x yyy yyyy [seven-digit local number] 01x1 yyy yyyy [seven-digit local number] 020 to 029. 0113 to 0119. 0121 to 0191. 020.

  11. Barker code - Wikipedia

    en.wikipedia.org/wiki/Barker_code

    A Barker code or Barker sequence is a finite sequence of N values of +1 and −1, with the ideal autocorrelation property, such that the off-peak (non-cyclic) autocorrelation coefficients. are as small as possible: for all . [1] Only nine Barker sequences [6] are known, all of length N at most 13. [7] Barker 's 1953 paper asked for sequences ...