What is a UAS's "line of sight" requirement?

The line of sight requirement for a UAS (Unmanned Aircraft System) is established to ensure that the remote pilot can continuously see the aircraft without any visual obstruction. This requirement is crucial for the safe operation of UAS, as it allows the pilot to monitor the aircraft's position, orientation, and surroundings in real-time. By maintaining visual line of sight, the remote pilot can better avoid hazards such as other aircraft, obstacles, and adverse weather conditions.

The requirement emphasizes that the pilot's awareness of the drone's environment is paramount for ensuring both safety and compliance with regulations set by governing bodies, such as the FAA in the United States. This rule helps reduce the risk of collisions and improves situational awareness, contributing to safer airspace management.

In contrast, other options either propose limitations that are not aligned with FAA regulations or imply that line of sight can be compromised in certain circumstances, which would undermine safety. The clear standard set by the continuous line of sight creates a secure operational framework for UAS operations.