What is the validity period of GFA charts?

The validity period of a Global Flight Advisory (GFA) chart is 12 hours. This duration is important for pilots because it gives them a clear timeframe during which the information on the chart is deemed to be relevant and reliable for flight planning and operations.

GFA charts provide critical information about weather conditions, TAFs (Terminal Aerodrome Forecasts), significant meteorological events, and other pertinent data that could affect instrument flight rules (IFR) operations. Given that weather can change rapidly, having a 12-hour validity ensures that pilots are able to make informed decisions based on the most current and useful information.

Understanding the validity period helps pilots remain aware of when they need to obtain updated information to ensure safety and compliance during flight operations.