A pressure washer is a tool that can be used to clean and remove dirt from the surface of the water. There are many types of pressure washers, with different features, for different purposes.
The best pressure washer for boat is one that has a high-pressure pump and an adjustable nozzle. This allows you to clean your boat in any direction without getting water everywhere. It also helps you to maintain a steady stream of water without wasting it on areas that don't need it.