Which of the following is a requirement for ADS-B Out?

The requirement for ADS-B Out is that aircraft must be equipped with this technology when operating in Class A, B, and C airspace. This is crucial because ADS-B enhances situational awareness and provides information on an aircraft's position to air traffic control as well as other aircraft, thereby improving safety and efficiency in crowded airspace.

In Class A airspace, above 10,000 feet, heavy traffic flows necessitate accurate and reliable tracking, which ADS-B Out provides. Similarly, in Class B airspace, which surrounds major airports, and Class C airspace, typically surrounding smaller airports with some traffic, the use of ADS-B Out is vital for maintaining safe separation between aircraft. Without this requirement, coordination and traffic management would be significantly hampered, increasing the likelihood of mid-air collisions.

Understanding this requirement is essential for pilots operating in those airspaces, as compliance with ADS-B mandates helps to maintain the integrity of the National Airspace System.