How many RPA can a visual observer assist at one time?

A visual observer can assist with only one remotely piloted aircraft (RPA) at a time to ensure safety and effective monitoring. This restriction is in place because the role of a visual observer is to maintain situational awareness regarding the surrounding environment and provide critical information to the pilot about potential hazards, other air traffic, or changes in the operational area. By focusing on one RPA, the visual observer can effectively ensure that the operation remains safe and within regulatory compliance, as they must be able to visually track the aircraft at all times. Managing multiple RPAs would complicate this task, increase the risk of missing important visual cues, and potentially lead to unsafe situations.