What are the standard transponder codes to indicate radio failure and emergency?

What are the standard transponder codes to indicate radio failure and emergency?

• A. 7600 for radio failure; 7700 for emergency
• B. 7500 for radio failure; 7700 for emergency
• C. 7600 for radio failure; 7600 for emergency
• D. 7600 for emergency; 7700 for radio failure

Answer: (A)

Transponder codes (squawk codes) convey your situation to ATC through radar. For loss of radio communications, you set 7600 to indicate radio failure. For any type of emergency, you set 7700 to signal an urgent or priority situation. The other options mix up these meanings or assign the hijack code (7500) to radio failure, which isn’t correct. So the correct pairing is 7600 for radio failure and 7700 for emergency.

Transponder codes (squawk codes) convey your situation to ATC through radar. For loss of radio communications, you set 7600 to indicate radio failure. For any type of emergency, you set 7700 to signal an urgent or priority situation. The other options mix up these meanings or assign the hijack code (7500) to radio failure, which isn’t correct. So the correct pairing is 7600 for radio failure and 7700 for emergency.