What does the term "airborne sense and avoid" refer to?

The term "airborne sense and avoid" refers to technologies that allow an unmanned aircraft system (UAS) to detect and avoid obstacles and other aircraft while in flight. This capability is crucial for the safe operation of UAS in airspace where they may encounter manned aircraft or physical obstacles. The technology typically involves a combination of sensors and algorithms that enable the UAS to perceive its environment, assess potential collision risks, and take autonomous actions to maintain safe separation from other aircraft and obstacles. This enhances operational safety and compliance with regulations governing unmanned flight.

The other options do not encompass the full meaning of "airborne sense and avoid." Tracking speed, GPS navigation, and communication between UAS, while important functions in UAV operations, do not specifically relate to the ability to detect and avoid potential collisions.