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Decode the following RVR from a METAR message:

R28/1000U

  • A

    Runway 28, 1000 metres, unchanged

  • B

    Runway 28, under 1000 metres

  • C

    Runway 28, 1000 metres upper limit

  • D

    Runway 28, 1000 metres changing upwards

Runway Visual Range (RVR) is 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.

PrefixDefinitionExample
MIf visibility is less than the lowest reportable RVR value.R36/M0600 = indicates the RVR for runway 36 is less than 600 m.
Pif visibility is greater than the highest reportable valueR36/P6000 = indicates the RVR for runway 36 is greater than 6000 m.
VWhen RVR varies by more than one reportable value over a 10-minute period, the lowest and highest values are paired with a "V" between them.R36/1100V1500 = indicates the RVR for runway 36 is varying between 1100 m and 1500 m.

Suffix "D" - denotes decreasing tendency
Suffix "U" - indicates increasing tendency
Suffix "N" - no tendency

R28/1000U => Runway 28, 1000 metres chaging upwards ("U" => increasing tendency)

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