Sector 1215 was a location on Installation 04. Around 40,000 BCE, an unidentified alien vessel crash-landed in this sector. Sometime prior to the crash, the ship started broadcasting a distress signal, looping every 72.83 seconds. After attempting to translate it, 343 Guilty Spark blocked the signal, as no communication revealing the location of any of the Halos was allowed. A containment sarcophagus was later built around the vessel.