How should ground personnel react when a crane approaches power lines?

When a crane approaches power lines, it is crucial for ground personnel to prioritize safety by relocating to a safe distance away from the operation. This action is vital because electrical hazards pose significant risks, including the possibility of electrocution or electrical arcing if the crane makes contact with the power lines. Establishing a safe distance helps to ensure that personnel are not in harm's way and allows the crane operator to focus on navigating the operation without additional distractions.

The other choices suggest unsafe behaviors that could potentially lead to dangerous situations. Ignoring the hazard fails to consider the serious risks involved, while assisting the operator closely could inadvertently place personnel in danger, as they could be within the hazardous zone. Operating another crane nearby further complicates the situation and increases the risk of accidents occurring, as multiple machines can create additional hazards and distract from the main operation. Keeping a safe distance is the most responsible and effective response to protect everyone involved.