What is a signal person's primary responsibility during a lift?

The primary responsibility of a signal person during a lift is to monitor the load and surrounding hazards. This role is critical because the signal person serves as the eyes and ears for the crane operator, who may have limited visibility of the load and the area surrounding it. By focusing on the load and any potential hazards, the signal person can ensure that the lift is executed safely and efficiently.

This includes watching for obstacles that could interfere with the lift, ensuring that the load is correctly balanced, and alerting the operator to any sudden changes in the environment that could pose risks. The signal person's vigilance helps prevent accidents and maintains a safe working environment for everyone involved in the operation.

The other options involve tasks that do not align with the core responsibilities of a signal person. Operating the equipment is the operator's responsibility, while assisting with calculations and handling materials are tasks outside the signal person’s primary role during a lift, which primarily focuses on safety monitoring.