Which condition may indicate the need for immediate rescue from a pool?

A guest in a relaxed position at the bottom of the pool can indicate a serious situation that may require immediate rescue. This position suggests that the individual is not actively swimming or attempting to remain afloat, which could signify distress or loss of consciousness. In aquatic environments, it's essential for lifeguards to recognize that someone submerged and not moving could be in peril and may require urgent assistance to ensure their safety.

In contrast, guests floating comfortably, treading water actively, or splashing in shallow water usually suggest that those individuals are capable of managing themselves in the water. These actions typically imply that they are safe and aware of their surroundings, reducing the urgency for intervention in those cases. Thus, recognizing the signs of a potential emergency, such as a guest remaining passive and at the bottom of the pool, is crucial for effective lifeguarding and ensuring the safety of all patrons.