Liquid transport refers to craft and systems designed to carry sophonts and cargo both above and below the surface of a liquid medium. For typical Terragens, the majority of such craft are designed to operate in a liquid water (H2O) environment, although craft have also been built to travel on and in other substances such as liquid methane, molten rock, and even the liquid hydrogen found deep beneath the surface of Jovian class worlds.
Amphibian (vehicle) - Text by M. Alan Kazlev A vehicle that can function equally well on or under the water and on land. See also Triphibious. Such vehicles are very popular on Pacifica, Oro Mistral, and other water worlds.
Omnicraft - Text by Todd Drashner Versatile mode of transport designed to operate and provide accommodations in a wide range of environments from planetary surfaces to interplanetary space.