What sign must be displayed when there is no lifeguard on duty?

The sign that must be displayed when there is no lifeguard on duty is clearly defined to inform swimmers about the lack of supervision and ensure their awareness of the associated risks. This specific phrasing, "WARNING NO LIFEGUARD ON DUTY," serves as a straightforward alert that encourages swimmers to take personal responsibility for their safety while enjoying the pool.

This sign is critical in promoting safety and accountability. It is commonly mandated by health and safety regulations to prevent potential accidents and ensure that users of the pool are fully informed about who is responsible for monitoring safety while they swim. By having this sign prominently displayed, it reduces liability for the pool owner or operator, as patrons are forewarned about the absence of lifeguard supervision and are expected to swim at their own discretion. This aligns with public safety practices and reinforces a culture of awareness among swimmers.