What is a standard radio-check phrase used?

• A. Dispatch, this is [call sign], radio check.
• B. Loud and clear
• C. Lima Charlie
• D. Radio check complete

Answer: (A)

Using proper radio-communication procedure to initiate a radio check ensures you identify who you are, address the correct station, and request a test of the link. Saying, for example, “Dispatch, this is [call sign], radio check” clearly prompts the receiving party to acknowledge and confirms that the transmission path is functioning. This format is explicit, unambiguous, and follows standard aviation phraseology, which helps reduce miscommunication on busy frequencies.

Saying “Loud and clear” is something you’d hear as a response to confirm good reception, not how you start a test. “Lima Charlie” is a slang or non-standard shorthand used by some groups and isn’t the formal initiation you’d rely on in aviation radio procedures. “Radio check complete” would come after the test is done to indicate it’s finished, not to begin it.