A commercial jet boat is a type of boat propelled by high-velocity streams of water emerging from a nozzle located on the back of the boat. They are typically used for commercial tourism and sightseeing activities, such as whitewater rafting or as transportation across rivers and lakes. These boats are usually made of fiberglass or aluminum and usually have a wide, flat bottom to help them remain stable in rapids. They are capable of navigating shallow waters and can reach higher speeds than other watercrafts due to their high-pressure water jet.