Item from Dune by Frank Herbert
An enormous Spacing Guild transport ship — kilometers long, capable of folding space for instantaneous interstellar travel, and completely dependent on spice-saturated Navigators to function.
The heighliner is the connective tissue of the Imperium. Without Guild heighliners folding space between star systems, human civilization would fragment into isolated worlds within a generation. Every military deployment, every trade route, every political embassy moves through a heighliner. The Guild's monopoly on space travel gives them leverage over every faction in the Imperium — and they use it. At the heart of each heighliner sits a Navigator — a human being so mutated by spice saturation that they can no longer survive outside a tank of melange gas. The Navigator uses spice-induced prescience to chart a safe path through folded space. Without this prescient guidance, the ship could emerge inside a star, a planet, or the void between galaxies. The Navigator's spice dependency is the chain that binds all interstellar civilization to Arrakis. No faction attacks a heighliner. It is the one true taboo — worse than atomics. To destroy a heighliner would be to declare war on the infrastructure of civilization itself.
Vast beyond comprehension. A heighliner is measured in kilometers — a cylindrical structure large enough to contain entire fleets of smaller ships within its hold. The exterior is featureless dark metal, pocked by the micro-impacts of centuries in space. When it folds space, the visual effect is a kind of inversion — the ship seems to turn inside out for an instant before reappearing at its destination. The interior hold is a cavernous void where frigates, transports, and military vessels dock like fish inside a whale.
Also known as: Guild heighliner, Guild ship, foldspace vessel