Special Assembly Plant Concord is a secretive human shipbuilding facility operated by the Office of Naval Intelligence, based in the Oort cloud of the Sol system. The facility was utilized by the UNSC Navy to build Infinity-class supercarriers, including UNSC Infinity and UNSC Eternity, as part of Project: OUROBOROS. Construction workers remained stationed at the facility for years to ensure complete secrecy. The Special Assembly Plant was also the location used to build the research station Argent Moon, alongside its sister-stations.