During wind equipment outage, which method should be used to determine wind data for the runway in use, and what remark should be included?

• A. Use the wind data from the active end and add no remark
• B. Use wind data from a forecast source and add a forecast remark
• C. Use the most reliable system available and include a WND DATA ESTMD remark
• D. Do not report wind data

Answer: (C)

When wind measurement equipment is out of service, you must rely on the most reliable wind data source currently available for the runway in use, and you must append the WND DATA ESTMD remark to indicate the data are estimated due to the outage. This approach ensures crews and controllers understand the wind information is derived from the best remaining source and may be less precise. Relying on forecast data can mislead for immediate operations, and not reporting wind data at all leaves users without essential information. The ESTMD remark provides clear transparency about data quality, supporting safer, better-informed decisions.