Editing Autonomous robot (section)

==== Outdoor navigation ====

Outdoor autonomy is most easily achieved in the air, since obstacles are rare. [[Cruise missile]]s are rather dangerous highly autonomous robots. Pilotless drone aircraft are increasingly used for reconnaissance. Some of these [[unmanned aerial vehicle]]s (UAVs) are capable of flying their entire mission without any human interaction at all except possibly for the landing where a person intervenes using radio remote control. Some drones are capable of safe, automatic landings, however. [[SpaceX]] operates a number of [[autonomous spaceport drone ship]]s, used to safely land and recover [[Falcon 9]] rockets at sea.<ref name=nsf20141117>
{{cite news |last1=Bergin|first1=Chris |title=Pad 39A – SpaceX laying the groundwork for Falcon Heavy debut |url=http://www.nasaspaceflight.com/2014/11/pad-39a-spacex-groundwork-falcon-heavy-debut/ |access-date=2014-11-17 |work=NASA Spaceflight |date=2014-11-18 }}</ref> Few countries like India started working on [https://www.skyeair.tech/ robotic deliveries] of food and other articles by [[Unmanned aerial vehicle|drone]].

Outdoor autonomy is the most difficult for ground vehicles, due to:
* Three-dimensional terrain
* Great disparities in surface density
* Weather exigencies
* Instability of the sensed environment