What does LOS stand for in UAS operations?

LOS stands for Line of Sight in the context of UAS (Unmanned Aircraft Systems) operations. This term refers to a communication and control method where the pilot maintains a visual connection with the drone, ensuring that they can see the aircraft at all times during its operation. This visual link is crucial for safety, as it allows the operator to monitor the craft's flight path, respond to unexpected situations, and avoid obstacles. Maintaining a clear line of sight is often a regulatory requirement and is fundamental in ensuring safe and effective operations in various environments. The other options, while related to operational concepts, do not specifically capture the meaning of LOS as it pertains to the pilot's necessary control over the UAS.