A person whose sole task is watching the sUAS to report hazards to the rest of the crew is called a visual observer.
The person who keeps an eye on other people's work is sometimes allotted a duty to keep an eye on other work, and sometimes it is a kind of habit that one has had since childhood.
They have been impressed with keeping watch on other people's tasks so that they can create problems and hazards in their work. This is called the observer.
Therefore, in the case of sUAS, who is responsible for watching and reporting hazards to the rest of the crew, he is called the visual observer.
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