To prevent a bather from diving into too shallow water, where should depth markers be provided?

Depth markers are crucial for ensuring the safety of bathers, particularly in preventing accidents associated with diving into shallow water. Providing these markers on horizontal surfaces around the pool helps to inform individuals before they enter the pool area. This visibility is important as it prepares bathers for the water depth they can expect.

Markers on vertical surfaces within the pool, such as the walls or edges, further reinforce this safety measure, allowing bathers to be reminded of the water depth while they are in the pool itself, whether swimming or lounging.

The guideline suggesting a minimum of every 20 feet emphasizes a practical approach to constant reinforcement of safety information. This frequent placement ensures that depth markers are within the line of sight for bathers, significantly reducing the risk of them inadvertently diving into shallow water.

Overall, the combination of horizontal and vertical markers, along with strategic placement ensures that bathers are continuously informed, thereby enhancing safety and minimizing the risk of accidents in and around the pool.