Image from P. Bourne (copyright; used with permission)
Atmospheric transportation refers to vehicles and devices of various sorts for travel through gases, either in a planetary atmosphere or in the air of a large hab or worldhouse.
Image from Kevin Williams (copyright; used with permission)
Aerospace Engineering - Text by M. Alan Kazlev, modified from the original write-up by Robert J. Hall A field of engineering that combines aerodynamics, fluid dynamics, propulsion, thermodynamics, aerospace mechanics, virch simulations, materials science, energy use, nanofabrication and vehicular structures.
Aircar - Text by Todd Drashner Small personal aircraft often used for short to medium range transportation on planetary surfaces or within habitats and megastructures.
Aircraft - Text by M. Alan Kazlev Any vehicle capable of atmospheric travel at higher than ground-effect level.
Bubblehabs - Text by Stephen Inniss, With additional material by Tardigrada 2021 Artificial habitats that float in a planetary atmosphere, such as a cytherian, neptunian or jovian world.
Dirigible - Text by Stephen Inniss A neutrally buoyant atmospheric vehicle that is distinguished from other aerostats such as balloons by the fact that it can be steered and propelled. Dirigibles have remained a feature life on planets or in the larger habitats such as Bishop rings or Banks orbitals ever since the gas giants of Solsys were colonized in the Interplanetary Age. Fixed-wing craft are still preferred for rapid transport, but dirigibles of one kind or another are ubiquitous as automated cargo carriers and are also popular as leisure craft.
Exoatmospheric Fighter - Text by M. Alan Kazlev A small planet- ship- or orbital- based hybrid air- and space-craft, usually short- to very short range and armed with lasers and automatic cannon. Crew may include one or two bionts and several dedicated ai, or the whole vessel may be ai controlled. Propulsion is via jet or nanobank turbine for dense or slow atmospheric flight, ramjet or scramjet for hypersonic flight, and chemical, fusion or amat rocket for vacuum propulsion.
Lurkship - Text by M. Alan Kazlev Generally, a heavily armed and armoured, short-range hyperturing military vessel, capable of stealth operations in a hydrospheric and atmospheric environment for greatly extended periods of time. Subcraft or subships are similar but smaller and less well armed and equipped.
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.