Frequent. Applicable only to cumulonimbus (CB). Frequent FRQ Occasional. Applicable only to cumulonimbus (CB). Occasional OCNL Sky clear (0 oktas). Sky clear SKC 11 Scattered (3 - 4 oktas). Scattered sCT Isolated. Applicable only to cumulonimbus (CB). Isolated ISOL Embedded. Applicable only to cumulonimbus (CB). Embedded EMBD D-8 Layers. Applicable only to cumulonimbus (CB). Layers LYR 2019-10-24T10:48:29.014Z Few (1 - 2 oktas). Few FEW Broken (5 - 7 oktas). Broken BKN Code Table D-8: Cloud amount reported at aerodrome Overcast (8 oktas). Overcast OVC The items within this code table are the cloud amount categories of operational significance for aviation as specified in Technical Regulations, Volume II (WMO-No. 49): Meteorological Services for International Air Navigation. This code table contains a subset of the cloud amount categories defined in Part B FM 94 BUFR Code Table 0 20 008.