What limitation do Remote Control Operators face regarding visibility?

Remote Control Operators encounter a significant limitation concerning visibility due to the nature of remote operations, which can obstruct direct lines of sight to the machinery they are controlling. Since the operator is not physically present near the machinery, they rely on cameras and other remote tools to monitor and maneuver the equipment. These tools may not provide a complete or clear view of the operational area, leading to challenges in accurately assessing the environment and making timely operational decisions. This lack of a direct line of sight can hinder the operator's awareness of potentially hazardous situations or the status of the machinery, which is vital for safe and effective operation. The other factors mentioned, such as outdated equipment, difficulty in controlling the interfaces, or glare from screens, may impact the operation but do not directly relate to the primary limitation of visibility as it pertains to monitoring and interacting with machinery remotely.