What is the meaning of three short blasts of a whistle?

Three short blasts of a whistle are a clear and universally recognized signal among lifeguards, indicating that a lifeguard is taking emergency action. This specific sound alert is designed to grab the attention of both the pool staff and patrons, signifying an urgent situation that requires immediate awareness and response. The blast serves as both a warning and a call to attention, prompting others to look towards the lifeguard for further instructions or to assist if necessary.

This signaling method is crucial in maintaining safety at aquatic facilities, ensuring that everyone is informed of an emergency so that appropriate measures can be taken. Lifeguards often use distinct sounds or signals to convey different messages rapidly; the three short blasts are specifically designated for emergencies, which helps differentiate from other potential signals.

In contrast, the other options suggest different meanings that do not align with the established protocols for emergency actions in lifeguarding. For instance, starting a rescue drill, clearing the pool for cleaning, or signaling the end of a swimming session would typically involve distinct signals or predefined communication methods that differ from the urgent context implied by three short whistle blasts.