Speech Bubble

This article or section's title is a callsign, an alias, or a nickname, as no proper name for the subject has been revealed. You can help by adding it if it is now known.

This article is about the replacement Halo ring featured in Halo Wars 2. For the original Installation 04 featured in Halo: CE, see Installation 04. For the first replacement ring that was featured in Halo 3, see Installation 04B.

“I've discovered [that] the Ark keeps an almost finished ring in its central forges at all times. It's an emergency replacement in case one of the other rings breaks down.”
— Professor Anders informing Captain Cutter and Isabel of the ring's existence.

Installation 04C, sometimes referred to as Anders' Halo, was a Halo ring, created by Installation 00 after the destruction of Installation 04B. The ring was intended as a potential replacement should any of the remaining Halo rings be damaged or destroyed. It was discovered by Professor Ellen Anders as she searched for a way to contact the UNSC during the Battle of Installation 00.