If a rescue occurs, which lifeguard usually takes over surveillance of the rescuer's zone?

In the event of a rescue, the lifeguard to the rescuer's left typically takes over surveillance of the rescuer's zone. This practice is grounded in the principle of maintaining uninterrupted surveillance in the area where the rescue occurs. The lifeguard to the left of the rescuer can immediately step into the role of monitoring the area, ensuring that the safety of all patrons is maintained while the rescuer focuses on executing the rescue. This division of responsibilities helps to provide seamless coverage and safety.

Other choices do not align with the established procedures for ensuring vigilant surveillance during a rescue situation. For instance, the lifeguard who initiated the rescue is already engaged in an active role and is thus not available to monitor; the lifeguard nearest the victim, although close to the incident, may not be adequately positioned to take over the entire surveillance zone; and an off-duty lifeguard would not be in a position to assume responsibility for active surveillance in a situation that requires immediate attention. This collective approach ensures that every part of the swimming area remains monitored and protected.