Skyships, also known as skybots, are a form of transportation craft used throughout the 'continuum. they are distinguished from spacecraft because they can only operate in the atmosphere and cannot perform inter-planetary transportation. Originally used on Earth following the Great Rise as conventional ocean ships were not viable due to varying ocean depths causing many wrecks. Skyships are generally used to Ferry passengers and cargo between cities or areas on the same planet, such as courier services. Since the adoption of commercially viable spacecraft Skyships have been phased out of mainstream use, however are still used mainly for couriers or inter-city shuttle services.