How should depth markings be placed in relation to swimmers?

Depth markings should be visible from the water to ensure that swimmers can easily identify the depth of the pool at various points. This is crucial for safety, as swimmers need to be aware of the depth to make informed decisions about diving, jumping, or swimming in different areas of the pool. Visibility from the water allows swimmers in different positions and movements to quickly assess the depth without having to exit the water or strain to look for markings.

Markings solely on the side of the pool may not be easily readable for swimmers who are already in the water, particularly for those who are submerged. Depth markings at the bottom of the pool can be helpful, but they may not be as noticeable unless the water is very clear, and swimmers are actively looking down. Floating signs could provide some guidance but may not offer a consistent or reliable reference for depth across different parts of the pool. Thus, ensuring that depth markings are visible from within the water enhances safety and usability in the aquatic environment.