What advantage does using a rescue tube provide during a rescue?

Using a rescue tube during a rescue is highly advantageous because it maintains a safe distance while offering support to the victim. This is crucial because it allows the lifeguard to assist a distressed swimmer without putting themselves in danger. By extending the rescue tube towards the swimmer, the lifeguard can help pull them to safety while remaining at a distance that minimizes the risk of being overwhelmed by the victim's panic. This technique enables the lifeguard to maintain control over the situation and effectively lead the swimmer to safety without compromising their own safety.

The other options mentioned, such as acting as a flotation device for the rescuer or making the lifeguard more visible, are secondary benefits that do not directly address the primary function of the tube during an active rescue. While visibility and buoyancy are important aspects of rescue equipment, the key advantage lies in the safe distance it provides during an emergency intervention.