AMC1 MET.TR.210(c)(3) Observing meteorological elements
RUNWAY VISUAL RANGE (RVR) — RUNWAY LIGHT
INTENSITY
(a) Instrumented systems should consider the
runway light intensity.
(b) When instrumented systems are used for the
assessment of RVR, computations should be made separately for each available
runway.
(c) For local routine
report and local special
report, the light intensity to be used for the computation should be:
(1) for a runway with the lights switched on
and a light intensity of more than 3 % of the maximum light intensity
available, the light intensity actually in use on that runway;
(2) for a runway with the lights switched on
and a light intensity of 3 % or less of the maximum light intensity
available, the optimum light intensity that would be appropriate for
operational use in the prevailing conditions; and
(3) for a runway with lights switched off (or
at the lowest setting pending the resumption of operations), the optimum light
intensity that would be appropriate for operational use in the prevailing
conditions.
(d) In METAR and SPECI, the RVR should be based on the
maximum light intensity available on the runway.
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