How do you indicate a TRACON facility on the radio?

The correct way to indicate a TRACON facility on the radio is to use the term "(facility name) approach." This terminology is standard in aviation communications and helps pilots identify that they are communicating with the Terminal Radar Approach Control, which is responsible for managing aircraft during arrival and departure phases within a specific terminal area.

Using "(facility name) approach" clearly communicates to pilots that they are in controlled airspace near an airport, where ATC is providing instructions for landing and taking off, ensuring safety and efficiency in the terminal environment.

The other options do not accurately represent the designation of a TRACON facility. Referring to a TRACON as "(facility name) TRACON" is not standard radio phraseology, and "(facility name) center" would imply a different type of air traffic control facility, typically a en-route center responsible for high-altitude air traffic. Similarly, "(facility name) control" is too vague and does not specifically indicate the approach services provided by a TRACON facility.