***Meaning*** :: <u>A</u>utomatic <u>D</u>ependent <u>S</u>urveillance–<u>B</u>roadcast ***Definition*** :: A function on an aircraft or vehicle that periodically broadcasts its state vector (i.e., horizontal and vertical position, horizontal and vertical velocity) and other information. > [!quote] From [FAA Article](https://www.faa.gov/air_traffic/technology/equipadsb/capabilities/ins_outs) > - Automatic because it periodically transmits information with no pilot or operator involvement required. > - Dependent because the position and velocity vectors are derived from the Global Positioning System ([[GPS]]) or other suitable Navigation Systems (i.e., [[FMS]]). > - Surveillance because it provides a method of determining 3 dimensional position and identification of aircraft, vehicles, or other assets. > - Broadcast because it transmits the information available to anyone with the appropriate receiving equipment. ***Additional Resources:*** - [[AIM 4]]-5 - [[FAR 91.215 Transponder Use]] - [[ADS-B and Mode C Requirements.jpg]] ***Source*** :: [[PHAK Glossary]] #glossary #acronym