ADS-B Out broadcasts the aircraft's which data?

• A. Altitude and heading
• B. Three dimensional position and velocity
• C. Ground speed only
• D. Vertical speed only

Answer: (B)

ADS-B Out broadcasts the aircraft's three-dimensional position and velocity. The three-dimensional position means latitude, longitude, and altitude are transmitted, typically using GNSS for precise location. The velocity part conveys how the aircraft is moving through space, including direction (track), speed over the ground, and the vertical rate (climb or descent). Together, these provide a complete picture of where the airplane is and how it’s traveling, not just a single piece like ground speed or vertical speed alone. The other options break that down into just one element or omit part of the data, so they don’t describe the full ADS-B Out transmission.