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  2. Whelen Engineering Company - Wikipedia

    en.wikipedia.org/wiki/Whelen_Engineering_Company

    The Whelen Engineering Company is an American corporation that designs and manufactures audio and visual warning equipment for automotive, aviation, and mass notification industries worldwide. Founded in a Deep River, Connecticut garage in 1952, [ 1 ] Whelen has become a provider of warning lights, white illumination lighting, sirens, and ...

  3. Precision approach path indicator - Wikipedia

    en.wikipedia.org/wiki/Precision_Approach_Path...

    The aircraft is slightly below the glideslope. A precision approach path indicator ( PAPI) is a system of lights on the side of an airport runway threshold that provides visual descent guidance information during final approach. It is generally located on the left-hand side of the runway approximately 300 meters beyond the landing threshold of ...

  4. Aviation light signals - Wikipedia

    en.wikipedia.org/wiki/Aviation_light_signals

    Aviation light signals. A United States Air Force airman with a signal light gun that can be used to control aircraft with radio failure. In the case of a radio failure or aircraft not equipped with a radio, or in the case of a deaf pilot, air traffic control may use a signal lamp (called a "signal light gun" or "light gun" by the FAA [ 1 ][ 2 ...

  5. Navigation light - Wikipedia

    en.wikipedia.org/wiki/Navigation_light

    Navigation light. A navigation light, also known as a running or position light, is a source of illumination on a watercraft, aircraft or spacecraft, meant to give information on the craft's position, heading, or status. [ 1] Some navigation lights are colour-coded red and green to aid traffic control by identifying the craft's orientation.

  6. Aviation obstruction lighting - Wikipedia

    en.wikipedia.org/wiki/Aviation_obstruction_lighting

    Aviation obstruction lighting. Emley Moor transmitting station using a red warning beacon. Aviation obstruction lighting is used to enhance the visibility of structures or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction lighting is commonly installed on towers, buildings, and even fences located in areas ...

  7. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    Hungary. [edit] The first ever civil defense air raid siren system was installed in 1938-1939 by the Hungarian Goverment to warn the public of air attacks. Electric-motor sirens were placed in big cities, the high-range sirens were placed in downtown, while the suburban areas had small-range electric-motor sirens.

  8. Marker beacon - Wikipedia

    en.wikipedia.org/wiki/Marker_beacon

    Marker beacon. Locator Outer Marker (LOM), a High Frequency (HF) Non-Directional Beacon, co-located with an "outer marker" (OM) 75-MHz Marker Beacon. A marker beacon is a particular type of VHF radio beacon used in aviation, usually in conjunction with an instrument landing system (ILS), to give pilots a means to determine position along an ...

  9. Annunciator panel - Wikipedia

    en.wikipedia.org/wiki/Annunciator_panel

    An annunciator panel, also known in some aircraft as the Centralized Warning Panel ( CWP) or Caution Advisory Panel ( CAP ), is a group of lights used as a central indicator of status of equipment or systems in an aircraft, industrial process, building or other installation. Usually, the annunciator panel includes a main warning lamp or audible ...

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