What is a primary requirement when flying through an ADIZ?

When flying through an Air Defense Identification Zone (ADIZ), a primary requirement is the use of an altitude-reporting transponder. The purpose of this requirement is to enhance situational awareness for both air traffic control and military air defense systems. An altitude-reporting transponder provides important information regarding the aircraft’s altitude and identity, which is essential for maintaining airspace security and safety.

This allows for more effective monitoring and coordination of air traffic within the ADIZ, ensuring that all aircraft operating in the area can be positively identified and their altitudes verified. Essential for any aircraft operating in an ADIZ, the transponder information helps differentiate commercial, civilian, and military flights, which is crucial in preventing unauthorized incursions.

Other requirements, while potentially relevant to general flying operations, do not specifically pertain to the essential safety and security measures required in an ADIZ context as clearly as the use of an altitude-reporting transponder does.