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  2. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    An ATC ground station consists of two radar systems and their associated support components. The most prominent component is the PSR. It is also referred to as skin paint radar because it shows not synthetic or alpha-numeric target symbols, but bright (or colored) blips or areas on the radar screen produced by the RF energy reflections from the target's "skin."

  3. List of Virginia area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Virginia_area_codes

    This is a list of area codes in the Commonwealth of Virginia. 276 — Southwest corner of the state including Bristol, Galax, Martinsville, and Wytheville (September 1, 2001 as split from 540). 434 — South central area including Charlottesville and Lynchburg (June 1, 2001 as split from 804).

  4. Area codes 757 and 948 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_757_and_948

    The area colored red indicates the southeast corner of Virginia served by area code 757. Area codes 757 and 948 are telephone area codes in the North American Numbering Plan (NANP) in Virginia. They serve the Hampton Roads metropolitan area and the Eastern Shore of the state. Area code 757 was established July 1, 1996 in an area code split of ...

  5. Avoid Answering Calls from These Area Codes: Scam Phone ... - AOL

    www.aol.com/avoid-answering-calls-area-codes...

    Now, many scam phone numbers have different area codes, including 809, which originates in the Caribbean. Another area code to look out for may look like it’s coming from the United States, but ...

  6. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace unless another code is assigned by ATC (US). [3] US: External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.) [3] 1100 US

  7. Area control center - Wikipedia

    en.wikipedia.org/wiki/Area_control_center

    In air traffic control, an area control center (ACC), also known as a center or en-route center, is a facility responsible for controlling aircraft flying in the airspace of a given flight information region (FIR) at high altitudes between airport approaches and departures.

  8. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    To avoid the response masking important radar targets behind the beacon, racons only operate for part of the time. In the United Kingdom , a duty cycle of about 30% is used — usually 20 seconds in which the racon will respond to radar signals is followed by 40 seconds when it will not, or sometimes 9 seconds on and 21 seconds off (as in the ...

  9. Washington Air Route Traffic Control Center - Wikipedia

    en.wikipedia.org/wiki/Washington_Air_Route...

    Download QR code; Print/export ... Sector 30 OLD Valley VAL has been changed to NEW 72 Shenandoah SHD Super Hi Sector in Area 1 above. ... 39 Snow Hill SWL 121.375 ...