What should a signal person do when they notice a potential hazard?

The correct action for a signal person who notices a potential hazard is to notify the operator immediately. This is crucial because the signal person's primary role is to ensure the safety of all personnel involved in the operation. By promptly informing the operator of any hazards, the signal person can help prevent accidents or injuries that could result from continuing operations without addressing the risk.

When a potential hazard is identified, the immediate safety of the crew and site is the top priority. Operating machinery or procedures without addressing identified hazards can lead to dangerous situations. Therefore, recognizing the importance of clear communication and timely actions is vital in maintaining a safe working environment.

The other choices do not prioritize safety adequately. Continuing to signal despite noticing a hazard could lead to escalating the risk of accidents. Waiting for further instructions introduces delays that could be avoided by taking immediate action. Ignoring the hazard is unacceptable as it contributes to unsafe working conditions.