Line installation

A Line installation is a Forerunner installation, part of the Maginot Line, intended to serve as a defensive outpost preventing enemy ships from reaching the inner worlds of the Orion complex.

Background
During the Forerunner-Flood war, Line installations were used as containment measures against Flood-controlled spacecraft, preventing them from reaching the Forerunner core worlds. Additionally, they serve as Flood research facilities, and are designed to target and destroy any Flood-infested ships passing within close range of the installation in slipspace. These installations are usually located on a satellite of a nearby planet. Each installation has its own monitor and a control center, as well as a sizable force of Sentinels and Gatherers.

History
At some point during the Human-Covenant War in the late 2552, the Long Time Coming, as well as the Covenant assault carrier Clarity of Faith were shot down by Line Installation 1-4's defenses while in Slipspace. As a result, they both crash-landed on an unidentified moon in Sub-sector 35. Personnel were taken by Gatherers into the main facility of the installation, for study by the installation's Monitor, 686 Ebullient Prism. During the Battle of Line Installation 1-4, the installation's control center was located and used to shoot down an entire Covenant fleet in Slipspace.

Known Line Installations

 * Line Installation 1-4
 * Unidentified line installation

List of appearances

 * Halo: Blood Line
 * Halo 4
 * Halo: Silentium