Which code indicates unlawful interference?

Which code indicates unlawful interference?

• A. 7500
• B. 7600
• C. 7700
• D. 7777

Answer: (A)

Pilots and air traffic control use four-digit transponder (squawk) codes to signal specific situations quickly. The code that indicates unlawful interference, such as a hijack, is 7500. When ATC sees this code, they immediately initiate security procedures, notify authorities, and prioritize that aircraft for separation and safety. For context, 7600 means a loss of radio communication, and 7700 signals a general emergency requiring immediate attention. Some codes like 7777 are reserved for military use and not civil emergencies. So 7500 uniquely indicates unlawful interference.

Pilots and air traffic control use four-digit transponder (squawk) codes to signal specific situations quickly. The code that indicates unlawful interference, such as a hijack, is 7500. When ATC sees this code, they immediately initiate security procedures, notify authorities, and prioritize that aircraft for separation and safety.

For context, 7600 means a loss of radio communication, and 7700 signals a general emergency requiring immediate attention. Some codes like 7777 are reserved for military use and not civil emergencies. So 7500 uniquely indicates unlawful interference.