What is one of the primary uses for a rescue tube?

One of the primary uses for a rescue tube is to support distressed swimmers while maintaining a safe distance between the rescuer and the person in need. This equipment is designed to provide buoyancy and support, allowing the rescuer to effectively assist someone who is struggling in the water without putting themselves in danger. The rescue tube can be thrown to the distressed swimmer, allowing them to grab hold and be pulled to safety without the rescuer having to enter the water, which could be risky if the swimmer is panicking or uncoordinated.

This function is critical in lifeguarding, as it helps to facilitate a safe rescue process. The use of a rescue tube enables the lifeguard to perform rescues more effectively while minimizing the risk of additional casualties. In contrast, the other options represent scenarios that do not accurately reflect the main purpose and functionality of a rescue tube.