What does it mean to 'read back' a clearance, and when should you do it?

• A. Repeat the clearance in your own words.
• B. Read back only if you are unsure.
• C. Read back the clearance exactly to confirm.
• D. Read back the clearance exactly to confirm; typically for new clearances.

Answer: (D)

Read back means you repeat the clearance exactly as ATC gave it, word for word, to confirm you heard every detail correctly. This practice helps catch any mishearing of numbers, routes, altitudes, frequencies, or other instructions, so both you and ATC share the same understanding.

You should perform this verbatim readback especially when the clearance is new or contains changes from what you previously had. Repeating it exactly prevents misinterpretation that could occur if you paraphrase or summarize. Paraphrasing can unintentionally alter details, which is why the exact repetition is the safest and most common practice for new clearances.