What does "geo-fencing" refer to in UAS operations?

Geo-fencing in Unmanned Aircraft Systems (UAS) operations refers to the use of GPS technology to establish virtual boundaries that restrict flight within certain areas. This technology enables drone operators to define operational zones and prevent their UAVs from entering restricted airspace, such as near airports or sensitive areas, thereby enhancing safety and compliance with regulations.

When a drone approaches the predetermined geographical boundaries established through geo-fencing, it can automatically trigger warning alerts or implement an immediate change in flight patterns, such as returning to a safe location or hovering in place. This is particularly important for protecting no-fly zones and ensuring that drone flights adhere to local regulations and airspace restrictions.

The other options do not accurately capture the essence of geo-fencing. For instance, while aerial photography involves mapping regions, it doesn't relate to the establishment of virtual flight boundaries. Similarly, establishing communication with other drones does not pertain to the concept of preventing a drone from flying into forbidden areas, and flying at specific altitude limits is more about operational parameters rather than geographical boundary restrictions.