Hovercraft were amphibious vehicles.
Shortly after landing on a beach near Cape Arid in Australia, the Second Doctor, Jamie McCrimmon and Victoria Waterfield were chased by three killers in a hovercraft, who believed the Doctor to be Salamander. (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 hitched a lift from Jack Harris. (PROSE: The Eight Doctors)
Lupton used a hovercraft while being chased by the Third Doctor, after stealing the Metebelis crystal. (TV: Planet of the Spiders)
The crew of a Delta III refinery used a hovercraft to travel through the swamps. (TV: The Power of Kroll)
Jo Jones mentioned that she and her grandson Santiago Jones were due to take a hovercraft as transport to Norway. (TV: Death of the Doctor)