What is the purpose of a readback of a clearance?

• A. To confirm the exact clearance details (altitude, heading, route, etc.) have been correctly understood.
• B. To remind ATC of the last instruction you received.
• C. To log the clearance in the flight log.
• D. To indicate you disagree with the clearance.

Answer: (A)

The readback of a clearance is a verification step to ensure exact details are understood. By repeating back the clearance—altitude to hold, route or heading, any speed restrictions, and other specified instructions—you confirm with ATC that you heard and interpreted the details correctly. This mutual confirmation helps catch and correct any miscommunications before you execute the instruction, reducing the risk of flying the wrong altitude, on the wrong heading, or along an unintended route. It’s not about reminding ATC of a previous instruction, nor is it a flight-log entry, and it’s not a way to express disagreement—those situations are handled through clarification or further instruction.