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Hovercrafts are vehicles that are capable of traveling over land, water, mud, ice, and other surfaces by floating on a cushion of air. They are typically propelled by propellers or air fans and are used for transportation, military operations, search and rescue missions, and recreational purposes. Hovercrafts are known for their ability to glide smoothly over various terrains and their unique design that allows them to hover above the surface they are traveling on.