Which transponder code signifies a failure in radio communication?

Which transponder code signifies a failure in radio communication?

• A. 7500
• B. 7600
• C. 7700
• D. 7800

Answer: (B)

The transponder code that signifies a failure in radio communication is 7600. This code indicates that an aircraft is unable to communicate with air traffic control due to radio malfunction. When this code is set, it alerts ATC that the pilot is having difficulties, allowing them to treat the situation with the appropriate urgency and utilize visual signals or alternative communication methods to maintain safety. Other transponder codes serve different purposes: 7500 indicates a hijacking, 7700 is used to signify a general emergency, and 7800 does not correspond to any standard transponder code used in aviation. Thus, 7600 is specifically designated for radio communication failures, which makes it the correct answer.

The transponder code that signifies a failure in radio communication is 7600. This code indicates that an aircraft is unable to communicate with air traffic control due to radio malfunction. When this code is set, it alerts ATC that the pilot is having difficulties, allowing them to treat the situation with the appropriate urgency and utilize visual signals or alternative communication methods to maintain safety.

Other transponder codes serve different purposes: 7500 indicates a hijacking, 7700 is used to signify a general emergency, and 7800 does not correspond to any standard transponder code used in aviation. Thus, 7600 is specifically designated for radio communication failures, which makes it the correct answer.