What is indicated by one long whistle blast?

One long whistle blast is recognized as a signal to clear the pool. This action is used to ensure the safety of all patrons in the swimming area. It indicates that there is an immediate need for all individuals in the water to exit, whether due to an emergency situation, a scheduled program change, or any other significant reason that requires the area to be free of swimmers. The clarity and urgency of one long blast help to ensure that patrons understand the importance of responding quickly for their safety and the safety of others. By signaling this way, lifeguards can effectively manage the pool environment and protect everyone present.