What is the function of anemometer calibration and how often is it typically performed?

• A. To ensure wind speed accuracy; calibration follows the maintenance schedule or after replacement.
• B. To measure air temperature.
• C. To adjust humidity readings.
• D. To calibrate the radar antenna alignment.

Answer: (A)

Anemometer calibration is about ensuring the wind-speed readings are accurate by comparing the sensor to a known reference and adjusting it as needed. This keeps wind data trustworthy for flight operations and weather decisions. It’s performed according to the maintenance schedule or after replacing the sensor, and also whenever drift or malfunction is suspected. It isn’t about measuring air temperature or humidity, nor about calibrating radar antenna alignment, so those options don’t fit.