A qualified signal person should have knowledge of standard hand and voice signals along with an understanding of:

A qualified signal person must possess a thorough understanding of crane operations and limitations because this knowledge directly impacts the safety and efficiency of lifting activities. Understanding how cranes function, including their load capacities, maneuverability, and operational limits, allows the signal person to effectively communicate with the operator and provide accurate signals during lifting operations.

This expertise ensures that the signal person can identify potential hazards and make informed decisions regarding the lifting process. It includes knowing the dynamics of the load being lifted, how to respond to equipment failures, and how to adjust commands based on the crane's capabilities in different conditions.

While being aware of weather conditions, safety protocols, and company policies is important, these aspects are secondary to the critical requirement of understanding crane operations and limitations. Mastery of this knowledge is foundational for maintaining safety on the job site and preventing accidents during crane operations.