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==Spacecraft navigation== In 2011, [[ORBITEC]] developed the first [[light-emitting diode|light-emitting diode (LED)]] system for use as running lights on spacecraft. Currently, [[Cygnus (spacecraft)|Cygnus spacecraft]], which are uncrewed transport vessels designed for cargo transport to the [[International Space Station]], utilize a navigational lighting system consisting of five flashing high power LED lights.<ref>{{cite web|url=http://www.orbitec.com/documents/cygnus.html|title=ORBITEC Delivers First-Ever LED Lighting System for Orbital Science's Cygnus Module Spacecraft Navigation Lighting|access-date=2013-04-13|url-status=live|archive-url=https://web.archive.org/web/20130820002758/http://www.orbitec.com/documents/cygnus.html|archive-date=2013-08-20}}</ref> The [[Cygnus (spacecraft)|Cygnus]] displays a flashing red light on the [[Port and starboard|port]] side of the vessel, a flashing green on the [[Port and starboard|starboard]] side of the vessel, two flashing white lights on the top and one flashing yellow on the bottom side of the [[fuselage]].{{cn|date=June 2022}} The [[SpaceX]] [[SpaceX Dragon|Dragon]] and [[SpaceX Dragon 2|Dragon 2]] spacecraft also feature a flashing strobe along with red and green lights.
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