In which scenario would Mode 3 be utilized under IFF?

Mode 3 of the Identification Friend or Foe (IFF) system is primarily utilized in conjunction with air traffic control systems, making it essential for both civilian and military air traffic operations. This mode is designed to provide a unique response from an aircraft to interrogations from radar systems, helping air traffic controllers accurately identify and track aircraft within controlled airspace.

Utilizing Mode 3 during civilian and military air traffic control enhances the safety and efficiency of flight operations by clearly distinguishing friendly aircraft from potential threats or unauthorized intrusions. This capability is crucial for maintaining situational awareness and coordinating airspace use between civilian aircraft and military operations.

In contrast, while Modes used in IFF may serve various functions across different contexts, the application of Mode 3 is specifically tailored for broader air traffic management rather than exclusive military applications, classified missions, or training scenarios.