If you cannot see the work area, what must you have before moving equipment?

When operating heavy machinery in circumstances where the operator cannot see the work area, it is crucial to have a signal person directing the operation. This is because the signal person acts as an intermediary between the operator and the work crew, ensuring clear communication and safe maneuvering of equipment. They are trained to communicate effectively with the operator, using standardized signals to guide the movement of the machinery, particularly in blind spots or congested work environments.

Having a signal person helps to mitigate risks associated with moving heavy equipment, as they can provide real-time feedback and alert the operator to any hazards or obstacles that may not be visible from the operator's perspective. This practice aligns with safety regulations and best practices in the construction and hoisting industries, which emphasize the importance of communication and situational awareness.

Other options may suggest various forms of oversight or approval, but they do not provide the immediate, proactive communication necessary for safely operating equipment when visibility is impaired. Therefore, the role of the signal person is essential for maintaining safety on the job site.