What is the transponder code for emergency?

The transponder code for emergencies is 7700. This code is used by pilots to indicate a general emergency situation that requires immediate attention from air traffic control. When a pilot sets their transponder to 7700, it alerts air traffic controllers and nearby aircraft that the aircraft is facing a situation that may pose a threat to its safety. This code is essential for effective communication and response in the event of emergencies such as mechanical failures, medical emergencies onboard, or any other critical situation that disrupts normal operations.

The other transponder codes serve specific purposes: 7500 indicates a hijacking or unlawful interference, while 7600 designates the loss of communication. These are important but pertain to specific scenarios rather than the broader category of emergencies that 7700 encompasses. Thus, 7700 is recognized universally as the standardized emergency code for pilots.