How do you dilute muriatic acid to clean boat bottom?

To dilute muriatic acid for cleaning a boat bottom, carefully mix one part acid with ten parts water in a well-ventilated area, wearing protective gear like gloves and goggles. Always add acid to water, not the other way around, to prevent violent reactions. Use a plastic container for mixing, and ensure the solution is used promptly and safely on the boat's surface. After cleaning, thoroughly rinse the area with fresh water to neutralize any remaining acid.