Which of the following is NOT a type of prefix used when a non-ATC facility relays ATC information?

The correct answer is a type of prefix used when a non-ATC facility relays ATC information. Prefixes serve to clarify the type of communication being relayed, such as an instruction, advisory, or request.

In aviation communication, prefixes help to categorize the information being transmitted. "ATC Clears," for instance, indicates that the information pertains to directives issued by air traffic control that must be followed by pilots. "ATC Advises" signifies that air traffic control is providing useful or important information to the recipient, while "ATC Requests" implies that ATC is asking for compliance or a specific action from pilots or other aircraft.

"ATC Reports," however, is not a recognized prefix for information relayed by non-ATC facilities. Instead, reports are typically generated as part of the communication protocol between ATC and pilots directly, rather than being an informal relay from a non-ATC source. This distinction is crucial in maintaining clarity and accuracy in air traffic communications, ensuring that all parties have a clear understanding of the nature of the information being exchanged.