A commercial hydrofoil is a type of boat that uses the technology of an underwater wing known as a hydrofoil. This underwater wing is designed to lift the boat above the water, thus reducing the amount of drag and friction between the boat and the water. As a result, this allows the boat to travel faster and more efficiently, reducing energy costs and fuel consumption. Commercial hydrofoils are usually made with a lightweight material and require a special type of engine. They are most often used for transportation and leisure activities. They are used to ferry passengers around and can often be seen in coastal areas, lakes, and other shallow waters.