At FAA facilities with an associated NWS office, when must the wind-direction and speed indicator readings be checked?

• A. Every 6 hours
• B. Every 12 hours
• C. At the beginning of each work day
• D. At the beginning of each work week

Answer: (C)

The main idea is to establish a reliable baseline for wind readings at the start of each work period. At facilities connected to the NWS, wind direction and speed indicators feed weather observations and ATC decisions, so verifying their readings at the beginning of the work day ensures the data you rely on for that day is accurate from the start. If the instrument drifts or was recently serviced, the day’s first check catches it before it affects operations across shifts. Checking every 6 or 12 hours isn’t aligned with shift-based use of the equipment, and waiting until the work week or extending to weekly checks leaves too long a window for drift or calibration issues to go unnoticed.