What is the main function of a lifeguard's whistle?

The main function of a lifeguard's whistle is to gain attention and signal warnings. This tool is essential for lifeguards as it allows them to communicate effectively in a noisy environment, such as a crowded pool or beach. A whistle provides a clear and audible means to alert swimmers to potential dangers, such as rough water conditions, unsafe behaviors, or the need to evacuate the water for safety reasons.

Using the whistle helps convey important messages quickly and efficiently without the lifeguard needing to approach individuals directly, allowing them to maintain supervision of the area while also ensuring safety. This is particularly critical in emergencies where immediate awareness of a situation can prevent accidents or injury.