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  2. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    Ceiling and Visibility OK [11] Visibility is at least 10 kilometres and no clouds below 5000 feet with no forecasted significant weather change such as precipitation. CAVU Ceiling and Visibility Unlimited CAW continuing airworthiness CB Cumulonimbus cloud: CBT computer-based training CCRs closed circuit mixed gas rebreathers CCRs

  3. Visual meteorological conditions - Wikipedia

    en.wikipedia.org/wiki/Visual_meteorological...

    VFR / VMC visibility requirements in the US. In aviation, visual meteorological conditions (VMC) is an aviation flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft.

  4. US Aviation CAVU - Wikipedia

    en.wikipedia.org/wiki/US_Aviation_CAVU

    The US Aviation CAVU (named for the aeronautical meteorology term meaning "Ceiling And Visibility Unlimited") is an American high-wing, strut-braced, single-seat, open cockpit, single engine in pusher configuration, ultralight aircraft that was designed and produced by AeroDreams of Manchester, Tennessee, but marketed by US Aviation of St Paul, Minnesota under their brand name.

  5. Instrument flight rules - Wikipedia

    en.wikipedia.org/wiki/Instrument_flight_rules

    Thus, cloud ceiling and flight visibility are the most important variables for safe operations during all phases of flight. [3] The minimum weather conditions for ceiling and visibility for VFR flights are defined in FAR Part 91.155, and vary depending on the type of airspace in which the aircraft is operating, and on whether the flight is ...

  6. Visual flight rules - Wikipedia

    en.wikipedia.org/wiki/Visual_flight_rules

    VFR requires a pilot to be able to see outside the cockpit to control the aircraft's altitude, navigate, and avoid obstacles and other aircraft. [3] Governing agencies establish specific requirements for VFR flight, including minimum visibility, and distance from clouds, to ensure that aircraft operating under VFR are visible from enough distance to ensure safety.

  7. CAVU - Wikipedia

    en.wikipedia.org/wiki/CAVU

    Ceiling and Visibility Unlimited, an aviation meteorology term; US Aviation CAVU, an ultralight aircraft, named after the meteorology term This page was last edited ...

  8. Runway visual range - Wikipedia

    en.wikipedia.org/wiki/Runway_visual_range

    A pilot's view of Lisbon Airport's runway 21 in fog; runway visual range is about 200 m (660 ft). In aviation, the runway visual range (RVR) is the distance over which a pilot of an aircraft on the centreline of the runway can see the runway surface markings delineating the runway or the lights delineating the runway or identifying its centre line.

  9. Prevailing visibility - Wikipedia

    en.wikipedia.org/wiki/Prevailing_visibility

    Prevailing visibility in aviation is a measurement of the greatest distance visible throughout at least half of the horizon, not necessarily continuously. To take the prevailing visibility, controllers reference a number of visual reference points: usually buildings , hills , or other geographic features.