Hovercraft were a type of amphibious vehicles.
Shortly after landing on a beach near Cape Arid in Australia, the Second Doctor was mistaken for Ramón Salamander by Anton, Rod and Curly, who chased after the Doctor, Jamie McCrimmon and Victoria Waterfield using their hovercraft. (TV: The Enemy of the World)
Jo Grant and John Hart used a Royal Navy hovercraft to escape from some Sea Devils; Jo was able to drive it. The Third Doctor and the Master were picked up by the hovercraft after the destruction of the Sea Devils' base. The Master hypnotised a sailor to pose as him while he escaped in the craft. (TV: The Sea Devils) As it was a very conspicuous form of transport, the Master abandoned it a short distance down the coastline and later hitched a lift from Jack Harris. (PROSE: The Eight Doctors)