Which transponder code is used for radio failure?

Which transponder code is used for radio failure?

• A. 7600
• B. 7500
• C. 7700
• D. 7400

Answer: (A)

The transponder code used for radio failure is 7600. When a pilot experiences a loss of communication, squawking 7600 alerts air traffic control (ATC) that the aircraft is unable to communicate, thereby enabling them to take appropriate measures for the safety of the flight. This code is part of the standardized set of transponder codes used internationally and serves to identify specific situations to ATC without the need for verbal communication. In contrast, the codes associated with security and emergencies serve different contexts. The code 7500 indicates a hijacking or unlawful interference, while 7700 signifies a general emergency. The code 7400 is not commonly used and does not have a specific meaning assigned in aviation. Understanding these distinct transponder codes is crucial for pilots to communicate effectively and ensure timely responses by ATC in various situations.

The transponder code used for radio failure is 7600. When a pilot experiences a loss of communication, squawking 7600 alerts air traffic control (ATC) that the aircraft is unable to communicate, thereby enabling them to take appropriate measures for the safety of the flight. This code is part of the standardized set of transponder codes used internationally and serves to identify specific situations to ATC without the need for verbal communication.

In contrast, the codes associated with security and emergencies serve different contexts. The code 7500 indicates a hijacking or unlawful interference, while 7700 signifies a general emergency. The code 7400 is not commonly used and does not have a specific meaning assigned in aviation. Understanding these distinct transponder codes is crucial for pilots to communicate effectively and ensure timely responses by ATC in various situations.