Automated weather data like ASOS/AWOS are often used by pilots before which flight phases?

• A. Before landing or takeoff
• B. During cruise only
• C. After landing only
• D. Only on the ground

Answer: (A)

Automated airport weather data are used to evaluate conditions right where the airplane will operate during the most critical near-ground phases. These observations provide current wind direction and speed, visibility, cloud ceiling, temperature, dew point, altimeter setting, and precipitation. Having this information just before takeoff helps determine if conditions meet minimums, pick the appropriate runway, assess crosswinds and wind shear risk, and set the altimeter accurately. Before the approach and landing, the same data confirm that the atmosphere is still within allowable limits for a safe arrival and help decide if an alternate plan or runway is needed. While pilots may reference other weather sources en route, ASOS/AWOS data are specifically used to assess and plan for conditions at the airport ahead of takeoff and again before landing.