What should be present at an operator's station when using an electromagnet?

When using an electromagnet, having emergency shut-off controls at the operator's station is crucial for safety. These controls allow the operator to quickly disengage the electromagnet in case of an emergency, such as equipment malfunction or an unsafe condition on the job site. This enhances the operator's ability to respond swiftly to potential hazards, minimizing the risk of accidents and injuries.

Additionally, while a power source indicator, a clear field of vision, and a communications device are important factors to consider in crane operations, they do not provide the immediate safety response that emergency shut-off controls do. The need for rapid intervention in emergencies makes the presence of these controls essential, highlighting their importance in safeguarding operators and other personnel working in proximity to the electromagnet.