From Halopedia, the Halo wiki
The Ranarum Orbital Platform is a Sangheili orbital platform in the Sanghelios system. The Aanrar Shipyard is located here.
Sometime after the Great Schism, the Covenant frigate Unflinching Resolve was sent to the Aanrar Shipyard here. There were other ships at the shipyard as well, many in serious need of repairs, one ship was simply an aft section with its drive. There were no Huragok to repair the ships, so the Sangheili used Unggoy as substitutes. In February 2553, Jul 'Mdama, Forze, Avu Med 'Telcam, Buran, and several of Buran's crew got to the platform by getting passage on a repair detail's shuttle. Once they arrived at the shipyard, they tricked the lone guard and stole the Resolve.