What does 10-9 mean?

What does 10-9 mean?

• A. Stand by
• B. Say again
• C. In service
• D. Urgent

Answer: (B)

Understanding radio communication basics helps you hear and understand messages clearly. Ten-nine is a signal used to request that the other person repeat what they just said. This is essential when a transmission is garbled, of fast speech, or some words were missed, so you can confirm the exact message before acting on it. That’s why the best choice is the one that means “say again” or “repeat.” The other options describe different actions or statuses—standing by means to pause and wait, being in service indicates availability, and urgent indicates priority rather than asking for repetition. So ten-nine directly matches the need to have the previous transmission repeated.

Understanding radio communication basics helps you hear and understand messages clearly. Ten-nine is a signal used to request that the other person repeat what they just said. This is essential when a transmission is garbled, of fast speech, or some words were missed, so you can confirm the exact message before acting on it.

That’s why the best choice is the one that means “say again” or “repeat.” The other options describe different actions or statuses—standing by means to pause and wait, being in service indicates availability, and urgent indicates priority rather than asking for repetition. So ten-nine directly matches the need to have the previous transmission repeated.