Before revision: Types Watercraft can be grouped into surface vessels, which include ships, yachts, boats, wingships, unmanned surface vehicles, sailboards and human-powered craft such as rafts, canoes, kayaks and paddleboards; underwater vessels, which include submarines, submersibles and unmanned underwater vehicles (UUVs); and amphibious vehicles, which include hovercrafts, car boats and amphibious ATVs .
After revision: Types Watercraft can be grouped into surface vessels, which include ships, yachts, boats, wingships, unmanned surface vehicles, sailboards and human-powered craft such as rafts, canoes, kayaks and paddleboards; underwater vessels, which include submarines, submersibles and unmanned underwater vehicles (UUVs); and amphibious vehicles, which include hovercrafts, car boats , amphibious ATVs and seaplaneshydroplanes, .