ED Decision 2021/005/R
RUNWAY
SURFACE CONDITION DESCRIPTORS — GENERAL
The runway
surface condition descriptors are used solely in the context of the RCR and
are not intended to supersede or replace any existing World Meteorological
Organization (WMO) definitions.
RUNWAY
SURFACE CONDITION DESCRIPTORS — FROST
(a) Freezing refers to the freezing point of water (0 °C).
(b) Under certain conditions, frost can cause the surface to become very slippery, and it is then reported appropriately as downgraded RWYCC.
RUNWAY
SURFACE CONDITION DESCRIPTORS — STANDING WATER
Running
water of depth greater than 3 mm is reported as ‘standing water’ by
convention.
RUNWAY
SURFACE CONDITION DESCRIPTORS – WET ICE
Freezing
precipitation can lead to runway conditions associated with wet ice from an
aeroplane performance point of view. Wet ice can cause the surface to become
very slippery. It is then reported appropriately as downgraded RWYCC.
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