What should a signal person do when using standardized signals?

A signal person's primary responsibility when using standardized signals is to ensure that all crew members understand those signals clearly. Effective communication is essential in operating cranes safely, as misinterpretation of signals can lead to accidents and injuries on the job site. Ensuring that the entire crew comprehends the standardized signals fosters a unified approach to operations, where everyone is on the same page regarding actions being taken.

For instance, if a signal person uses a specific hand signal that is not understood by a crane operator or other crew members, it could result in improper actions being taken, which could compromise safety. Therefore, establishing a shared understanding of the signals is critical to promoting safety and efficiency in crane operations.

The other options do not support effective communication or safety in the operation of cranes. Relying on personal preferences for signals, using only verbal instructions, or solely depending on hand signals could lead to confusion and increase the risk of accidents on site.