What is the required lettering height for the "Warning, No Lifeguard on Duty" sign?

The required lettering height for the "Warning, No Lifeguard on Duty" sign is established to ensure that the message is easily readable from a distance, which is crucial for safety and awareness. A height of 4 inches is standard in many regulations as it provides visibility to individuals approaching the pool area, allowing them to be alerted to the lack of lifeguard supervision. This height strikes a balance between being legible without being overly intrusive to the pool's aesthetics.

Understanding signage standards is essential for pool operators because effective communication of safety information significantly contributes to preventing accidents and ensuring the well-being of swimmers.