Braking action advisories

Braking Action Advisories
When tower controllers have received runway braking action reports which include the terms "poor" or "nil," or whenever weather conditions are conducive to deteriorating or rapidly changing runway braking conditions, ...

If an controller receives a braking action report worse than good, an advisory must be included in the ATIS ("Braking Action Advisories are in effect").

See also: Airport, Aircraft, Landing, Runway, ATIS