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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 end identifier light - Wikipedia

    en.wikipedia.org/wiki/Runway_end_identifier_light

    Runway threshold identification lights shall be located symmetrically about the runway centre line, in line with the threshold and approximately 10 meters outside each line of runway edge lights. Runway threshold identification lights should be flashing white lights with a flash frequency between 60 and 120 per minute.

  6. Approach lighting system - Wikipedia

    en.wikipedia.org/wiki/Approach_lighting_system

    The required minimum visibilities for instrument approaches is influenced by the presence and type of approach lighting system. In the U.S., a CAT I ILS approach without approach lights will have a minimum required visibility of 3/4 mile, or 4000 foot runway visual range. With a 1400-foot or longer approach light system, the minimum potential ...

  7. 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 ...

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