GM24 Annex I Definitions

• ED Decision 2021/005/R found in: Air Operations (965/2012) Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Feb 2025)

GM24 Annex I Definitions 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. GM24 Annex I Definitions 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. ##### GM24 Annex I Definitions *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.