The code 7500 is used to indicate a hijacking.

The code 7500 is used to indicate a hijacking.

• A. 0000
• B. 7600
• C. 7500
• D. 7777

Answer: (C)

In aviation communications, pilots use specific transponder codes to signal the nature of an in-flight emergency quickly. The code that signifies hijacking is 7500. When a cockpit sets the transponder to this code, air traffic control recognizes a potential hijack or unlawful interference and initiates security procedures, increasing separation from other aircraft and coordinating with authorities while keeping passengers as safe as possible. To see why this is the correct signal, compare it with other common codes: 7600 indicates a loss of radio contact, so ATC knows there’s a communication failure to resolve; 0000 is not a valid civilian emergency code and isn’t used to indicate a security issue; 7777 isn’t a standard civilian emergency code and isn’t used to signal hijacking.

In aviation communications, pilots use specific transponder codes to signal the nature of an in-flight emergency quickly. The code that signifies hijacking is 7500. When a cockpit sets the transponder to this code, air traffic control recognizes a potential hijack or unlawful interference and initiates security procedures, increasing separation from other aircraft and coordinating with authorities while keeping passengers as safe as possible.

To see why this is the correct signal, compare it with other common codes: 7600 indicates a loss of radio contact, so ATC knows there’s a communication failure to resolve; 0000 is not a valid civilian emergency code and isn’t used to indicate a security issue; 7777 isn’t a standard civilian emergency code and isn’t used to signal hijacking.