What is one of the main components of a lifeguard's rescue equipment?

One of the main components of a lifeguard's rescue equipment is the rescue tube. This floatation device is specifically designed to aid lifeguards in performing water rescues, providing both buoyancy and support for a distressed swimmer. It allows lifeguards to bridge the distance between themselves and the individual in need of assistance, ensuring that they can rescue the person safely and efficiently. The rescue tube can be thrown to a swimmer in distress, and its design allows the lifeguard to maintain control of the situation while providing necessary support to the victim until both can be returned to safety.

Other pieces of equipment, while potentially useful in specific circumstances, do not replace the critical function of the rescue tube, which is essential for effective rescue operations in aquatic environments.