Navigation machine

Developed by Ix at some point after the death of Leto II, Ixian navigation machines broke the Spacing Guild's monopoly on FTL space travel, and, by the time of the discovery of the Dar-es-Balat hoard, had supplanted guild navigators as the primary means of foldspace navigation.

Appearances

 * God Emperor of Dune (First mentioned)
 * Heretics of Dune