After receiving a clearance or instruction from ATC, what action should you take?

• A. Request a re-clearance if unsure
• B. Delay action until you can confirm
• C. Question the instruction
• D. Carry out the instruction and provide a readback of critical values if required

Answer: (D)

When ATC gives you a clearance or instruction, you should act on it promptly and verify your understanding by readback of any critical values if required. Carrying out the instruction keeps air traffic moving safely, and the readback provides a check that you’ve heard and interpreted the instruction correctly. Critical items to read back can include altitude changes, heading or course, airspeed restrictions, route changes, and transponder codes. If anything in the clearance is unclear, ask for clarification before or during the readback so there’s no ambiguity, but the standard expectation is to comply and confirm the key details. Delaying action or questioning the instruction without a safety issue can create confusion and disrupt operations, which is why this approach is preferred.