When weather sensors on the active approach end are operational and reliable, which data source is used for meteorological information?

• A. Data From the Active End
• B. Data From the Inactive End
• C. Data From a Nearby Airport
• D. Data From Both Ends Equally

Answer: (A)

When weather sensors on the active approach end are operational and reliable, the data source from that end is used. These sensors provide the most current, site-specific conditions for the actual approach and landing, since they are right at the point where the aircraft will encounter the weather. Relying on the active-end data minimizes latency and potential discrepancies that could arise from using sensors at the other end or a distant airport. The inactive end serves as a backup only if the active end isn’t available, and data from a nearby airport is used as an additional fallback when neither end’s local data is reliable. Using data from both ends equally isn’t necessary when the active end is functioning, as the goal is to use the primary, closest source of meteorological information.