What is UNICOM used for at non-towered airports?

UNICOM is a non-ATC communication system primarily used at non-towered airports to provide essential information and services to pilots. Its primary function includes relaying information regarding airport services, such as fuel availability, taxi instructions, and other logistical support needed for flight operations.

At a non-towered airport, pilots utilize UNICOM frequencies to communicate with various service providers. This allows them to coordinate fuel services, request hangar space, and obtain information about potential ground services. The format typically entails broadcasting requests or responses that might help other pilots in the area as well.

The other options pertain to functionalities that either belong to controlled airspace, such as communicating with ground control or requesting takeoff clearance, which is generally not applicable at non-towered airports. Monitoring air traffic is essential for safety, but it is conducted via visual observation or other means, rather than through a specific air traffic management protocol available at towered airports. Thus, the best answer highlights the support and services that UNICOM provides at non-towered airports.