Describe the reaction if a signal person sees an unqualified person near the crane operation area.

When a signal person observes an unqualified individual near the crane operation area, the appropriate reaction is to call for an immediate halt to operations. This response is crucial for maintaining safety on the job site. An unqualified person does not have the necessary training or knowledge to be in a potentially hazardous area where cranes are operating, which significantly increases the risk of accidents or injuries.

Halting operations immediately allows for a thorough assessment of the situation and ensures that the unqualified person can safely be removed from the area without any further risk. This action demonstrates a commitment to safety practices and is in alignment with standard operating procedures aimed at protecting everyone on the job site, including workers and bystanders.

While other options may suggest varying degrees of risk tolerance or inadequate responses, calling for a halt to operations is the responsible action that prioritizes safety and aligns with industry standards.