Installation 09

"I discovered 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."

- Ellen Anders on the Halo.

Installation 04C, also known as Anders' Halo after its discoverer during the battle for the Ark in 2559, is a Halo installation which was constructed at the Ark after the destruction of the previous replacement for the original Installation 04.

History
In the final months of the Human-Covenant War, Installation 00 constructed a replacement for Installation 04, which had been destroyed by John-117 during the Battle of Installation 04. The still-incomplete replacement ring, Installation 04B, was launched from the Ark's Foundry during the war's final battle, but was subsequently destroyed by its own premature firing, initiated by the Master Chief and Cortana in order to sterilize a Flood incursion on the Ark. The ring's firing severely damaged the Ark, though the massive installation was able to repair itself in time, and by May 2559, the Ark's Foundry had finished constructing a new replacement ring.

During the battle between the UNSC forces of the and the Banished occupying the Ark, the ring was discovered by Professor Ellen Anders. Consequently, she and Captain James Cutter formulated a plan to deploy the ring to the Soell system, Installation 04's former site, where it could be used to raise a distress beacon to the UNSC. They were successful, and although the Banished attempted to take control of the Halo, the UNSC forces emerged victorious. Additionally, Professor Anders was able to disarm the ring's firing mechanism from the control room, but she could not make it off the ring in time before it entered a slipspace portal to the Soell system. En route to its destination, however, the Halo was intercepted by a Guardian.

List of appearances

 * Halo 5: Guardians
 * Halo Wars 2