YED-4

YED-4 is a Covenant term for a dimension in slipstream space.

Great Schism
During the onset of the Great Schism on November 3, 2552, Zasses 'Jeqkogoee, the navigation officer of Incorruptible, noted the presence of anomalies of undetermined origin in YED-4 that may have an effect on the safety of the ship's immediate slipspace transition.

List of appearances

 * Halo: Ghosts of Onyx