Ceiling(Abbrev. CIG) - The height of the cloud base for the lowest broken or overcast cloud layer. Cloud CeilingSame as Ceiling; the height of the cloud base for the lowest broken or overcast cloud layer. Measured CeilingA ceiling classification applied when the ceiling value has been determined by an instrument, such as a ceilometer or ceiling light, or by the known heights of unobscured portions of objects, other than natural landmarks, near the runway. See variable ceiling.
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