Which ATS unit uses the call sign "RADIO"?

The Aerodrome Flight Information Service (AFIS) is the unit that uses the call sign "RADIO." AFIS is responsible for providing information to pilots regarding aerodrome traffic and other essential information to ensure safe operations at an airport. The term "RADIO" is used as a call sign to enhance communication clarity and maintain safety, especially in busy aerodrome environments.

In the context of air traffic services, communication call signs are vital for the identification of units providing different types of service. While other units like ATC Clearance Delivery, Terminal Control Centers, and Area Control Centers have their specific roles and protocols, they do not typically use the call sign "RADIO." Understanding the distinction between these services and their communication identifiers is crucial for aviation operations, where clear and unambiguous communication is paramount.