What should you use to effectively communicate when needing help?

Using hand signals to communicate when needing help is effective because it provides a clear and visible method of conveying your message, especially in noisy environments where shouting may not be heard. Hand signals can be standardized, allowing others to understand your request for assistance quickly and efficiently. This form of communication is particularly useful in situations like water rescues where verbal communication may be drowned out by water noise or where immediate clarity is essential.

Additionally, hand signals can be used at a distance, making them suitable for varied environments beyond the immediate vicinity of the person requiring help. They also minimize the risk of panic that shouting might induce, as well as the chance of miscommunication, ensuring that your need for assistance is understood by onlookers or fellow lifeguards.