What does the acronym "VLOS" stand for in UAS operations?

The acronym "VLOS" stands for "Visual Line of Sight." In the context of UAS (Unmanned Aircraft Systems) operations, it refers to the requirement that the remote pilot must be able to see the UAS with their own eyes (rather than through a camera or other visual aids) during its flight. This is crucial for maintaining awareness of the UAS's position and ensuring safety, as it allows the pilot to detect potential hazards in the surrounding environment. Operating within VLOS limits enables pilots to navigate more effectively and react promptly to avoid collisions or other issues.

Maintaining VLOS is also a regulatory requirement in many jurisdictions, emphasizing the importance of situational awareness and control at all times. The other choices do not accurately reflect the terminology or regulations associated with UAS operations, which underscores the importance of understanding terms like VLOS in maintaining compliance and safety in the field.