What should all persons involved in a hoisting operation be warned to do?

In a hoisting operation, it is crucial for all individuals involved to be warned to keep clear of moving cables or ropes. This is because moving cables or ropes pose significant risks, including potential entanglement, injury, or even fatality if someone is caught in their path. The dynamic nature of lifting operations can result in sudden movements or swings of the load and rigging components, increasing the likelihood of accidents if personnel are too close.

Understanding the hazards associated with moving cables and ropes is vital for maintaining a safe working environment. By keeping a safe distance, workers can minimize the risk of injuries associated with unexpected movements during the lifting process. Safety protocols within rigging operations emphasize this necessity, highlighting that maintaining a safe distance from moving parts is a fundamental safety practice. The other options, while relevant to safety in rigging operations, do not address the immediate dangers presented by moving cables and ropes as directly or urgently as this correct response does.