Why is it important for a signal person to be knowledgeable about the crane's movements?

Being knowledgeable about the crane's movements is crucial for a signal person primarily because it allows them to anticipate and communicate necessary adjustments effectively. This understanding enables the signal person to observe the crane's operation in real-time and provide clear guidance to the operator, ensuring that lifting and placement operations are safe and efficient.

When the signal person is aware of the specific movements and capabilities of the crane, they can anticipate potential hazards or the need for adjustments based on the load's position, the crane's reach, and the surrounding environment. This proactive communication helps prevent accidents and improves the overall safety of the operation, contributing to a more coordinated effort between the operator and the signal person.

The other options focus on aspects that are not directly related to the primary responsibility of the signal person in the context of operating a crane. For instance, performing maintenance on the crane or developing signaling codes may be relevant to other roles but do not directly address the immediate necessity of real-time communication during crane operations. Additionally, while operating the crane during emergencies is important, it is typically the operator's responsibility, not the signal person's.