The basic weather instrument equipment for terminals includes wind indicators and ___.

• A. Altimeters
• B. Ceilometers
• C. Automated Local Observing System (ALOS)
• D. Airport Weather Information System (AWIS)

Answer: (A)

Wind indicators give pilots the surface wind speed and direction, which is essential for safe taxiing, takeoff, and landing. An altimeter provides the altitude reading by measuring atmospheric pressure and translating it into height above sea level. Together, they give a pilot both wind information and an accurate altitude reference at the airport, which is the fundamental surface observation capability needed for safe operations. Ceilometers measure cloud base heights, which is more specialized; automated observing systems like ALOS or AWIS are data collection or distribution systems rather than the basic instrument pair used at the terminal. For these reasons, altimeters are the best fit.