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  2. 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.

  3. Instrument landing system - Wikipedia

    en.wikipedia.org/wiki/Instrument_landing_system

    Visibility minimums of 1 ⁄ 2 mile (0.80 km) (runway visual range of 2,400 feet (730 m)) are possible with a CAT I ILS approach supported by a 1,400-to-3,000-foot-long (430 to 910 m) ALS, and 3 ⁄ 8 mile (600 m) visibility 1,800-foot (550 m) visual range is possible if the runway has high-intensity edge lights, touchdown zone and centerline ...

  4. Visibility - Wikipedia

    en.wikipedia.org/wiki/Visibility

    The former a) is represented by the meteorological optical range (MOR). Annex 3 [1] also defines Runway Visual Range (RVR) as: The range over which the pilot of an aircraft on the centre line of a runway can see the runway surface markings or the lights delineating the runway or identifying its centre line.

  5. Runway - Wikipedia

    en.wikipedia.org/wiki/Runway

    Runway 13R at Palm Springs International Airport An MD-11 at one end of a runway. In aviation, a runway is an elongated, rectangular surface designed for the landing and takeoff of an aircraft. [1] Runways may be a human-made surface (often asphalt, concrete, or a mixture of both) or a natural surface (grass, dirt, gravel, ice, sand or salt).

  6. Southwest Airlines Flight 1248 - Wikipedia

    en.wikipedia.org/wiki/Southwest_Airlines_Flight_1248

    The runway visual range was reported at 4,500 feet (1,400 m), below the landing minimums for the instrument landing system approach to Runway 13C. The only available runway with lower minimums was the opposite direction on 31C, which the crew selected, with the aircraft's groundspeed consequentially boosted by the tailwind. [1]: 2 [12]

  7. Transmissometer - Wikipedia

    en.wikipedia.org/wiki/Transmissometer

    Transmissometer providing Runway Visual Range information. A transmissometer or transmissiometer is an instrument for measuring the extinction coefficient of the atmosphere and sea water, and for the determination of visual range. It operates by sending a narrow, collimated beam of energy (usually a laser) through the propagation medium.

  8. METAR - Wikipedia

    en.wikipedia.org/wiki/METAR

    Runway visual range (RVR) is an instrument-derived measurement that suggests the horizontal distance an observer may see down the runway. In the US, for stations with RVR reporting capacity, this information is omitted from the METAR unless the visibility is at or below 1 mi (1.6 km), or the designated instrument runway's RVR is at or below ...

  9. 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.