What must be maintained at all times while flying a sUAS?

Maintaining Visual Line of Sight (VLOS) while flying a small Unmanned Aircraft System (sUAS) is a fundamental requirement in many jurisdictions, including under regulations set forth by the Federal Aviation Administration (FAA) in the United States. VLOS means that the remote pilot or observer must be able to see the sUAS with their own eyes, without the aid of binoculars or other viewing devices, at all times during operation. This requirement is crucial for several reasons:

1. Safety: Visual contact allows the operator to maintain awareness of the sUAS's position relative to surrounding obstacles, other aircraft, and people on the ground. This helps prevent accidents and ensures the sUAS can be maneuvered safely.

2. Regulatory Compliance: Many regulations governing sUAS operations expressly require VLOS, and non-compliance may result in penalties or restrictions on future operations. Pilots must adhere to these legal requirements to operate legally and responsibly.

3. Situational Awareness: By keeping the sUAS within visual range, the operator can better assess real-time conditions such as weather changes, terrain features, or potential hazards. This situational awareness is essential for safe flight operations and effective decision-making.

The other options, while relevant to