Installation 07

Installation 07 is one of the seven Halo Rings. Very little is known about it and it has yet to be directly observed.

In 2552, during the Battle of Installation 05, a signal was sent to this Halo from Installation 05, putting it on standby mode. A readout from Installation 05's Control Room showed that Installation 07 was fully prepared to fire on demand.

A more comprehensive readout was later observed in the Ark during the Battle of the Ark by the Arbiter, Master Chief and the Prophet of Truth, once again displaying that Installation 07 was on standby mode, waiting to receive the signal to fire. However, the Master Chief deactivated the installation before it could be fired.

Trivia

 * The inner, inhabitable, surface of this Installation appears to have a desert or mountain-like terrain and topography, although this could be evidence of Flood infection on a massive scale. In fact, the picture of the surface is an image of the Venusian surface.
 * This ring is often confused with Installation 01 because it the first ring from the entrance to the Citadel. Although, it is in fact the furthest ring from the Ark's control terminal and the last ring to have its hologram light up during the activation sequence.