What is the function of a marine pump-out station?

The primary function of a marine pump-out station is to pump out waste from holding tanks. These stations are specifically designed to help boaters dispose of sewage and other waste materials safely and in accordance with environmental regulations. By utilizing a marine pump-out station, boaters can prevent the pollution of waterways, as discharging waste directly into the water can harm aquatic ecosystems and violate local laws.

In contrast to other choices, the option about cleaning contaminated fuel tanks addresses a different environmental concern, which is not the primary role of a pump-out station. Removing water from flooded bilges is more about addressing leaks or issues on a vessel rather than waste management. Lastly, controlling water flow at a dam pertains to flood management and water resource control, which is unrelated to the function of a pump-out station in a marina or boating facility. Thus, the correct answer highlights the specific and essential role of pump-out stations in maintaining water quality and environmental health in boating areas.