Watercraft are vehicles designed for travel on water. They come in various forms, including boats, ships, and submarines. Watercraft can be powered by engines, sails, or human effort, such as rowing. They are used for various purposes, including transportation, recreation, fishing, and military operations. Different types of watercraft serve specific functions. For example, fishing boats are designed to catch fish, while cargo ships transport goods across oceans. Sailboats rely on wind for movement, while motorboats use engines for speed. Each type of watercraft is built to navigate different water conditions, from calm lakes to rough seas.