What does UNICOM refer to?

UNICOM refers to a common radio frequency used at uncontrolled airports, where pilots can communicate information regarding their intentions, positions, and other operational aspects. This frequency is typically managed by a UNICOM operator, who may provide advisory services or relay information, although they do not have the authority to control air traffic.

At uncontrolled airports, the absence of air traffic control means that pilots must rely on their communication skills and the use of UNICOM to ensure safe operations. They announce their positions and intentions on this frequency to maintain awareness among all users in the vicinity. This system helps facilitate safe arrivals, departures, and taxiing while providing a means for effective communication among pilots flying to or from the airport.

In contrast, controlled airports typically have designated frequencies for operating with air traffic control, and it is not solely a unipurpose common frequency. Additionally, UNICOM is not specifically reserved for commercial airliners, as it serves all types of aircraft operating in uncontrolled areas. Therefore, the use of UNICOM frequency plays a crucial role in enhancing safety where formal air traffic services are not present.