Guild Navigator

Guild Navigator
Edric the Guild Navigator from the Children of Dune miniseries (2003)
Plot element from the Dune franchise
First appearance	Dune (1965)
Created by	Frank Herbert
Genre	Science fiction
In-story information
Type	Profession
Specific traits and abilities	Use of prescience to safely navigate interstellar space; excessive melange consumption mutates their bodies severely

A Guild Navigator (alternately Guildsman or Steersman) is a fictional humanoid in the Dune universe created by Frank Herbert. In this series and its derivative works, starships called heighliners employ a scientific phenomenon known as the Holtzman effect to "fold space" and thereby travel great distances across the universe instantaneously. Humans mutated through the consumption of and exposure to massive amounts of the spice melange, Navigators are able to use a limited form of prescience to safely navigate interstellar space. Control of these Navigators gives the Spacing Guild its monopoly on interstellar travel and banking, making the organization a balance of power against the Padishah Emperor and the assembled noble Houses of the Landsraad.

To enable their prescience, Guild Navigators not only consume large quantities of the spice, but are also continuously immersed in highly concentrated amounts of orange spice gas. This level of extreme and extended exposure causes their bodies to atrophy and mutate over time, their heads and extremities elongating, and causing them to become vaguely aquatic in appearance. The first external sign of melange-induced metabolic change is visible in the eyes, as the drug tints the sclera and iris to a dark shade of blue, called "blue-in-blue" or "the Eyes of Ibad," "a total blue so dark as to be almost black." This is a common side effect in all spice addicts.

In the original 1965 novel Dune, Duke Leto Atreides notes that the Guild is "as jealous of its privacy as it is of its monopoly," and that not even their own agents ever see Navigators. Leto's son Paul wonders if they are mutated to the point of no longer appearing human. At the end of the novel, two self-identified Guild Navigators accompanying Emperor Shaddam IV are described as "fat" but not otherwise non-human. The Guild Navigator Edric, introduced in the first chapter of Dune Messiah (1969), is called a "humanoid fish," and described in his tank of spice gas as "an elongated figure, vaguely humanoid with finned feet and hugely fanned membranous hands — a fish in a strange sea." The Navigators' "elongated and repositioned limbs and organs" are noted in Heretics of Dune. In 1985's Chapterhouse: Dune, Lucilla notes that "Navigators were forever bathed in the orange gas of melange, their features often fogged by the vapors," that they possess a "tiny v of a mouth" and "ugly flap of nose" and that "Mouth and nose appeared small on a Navigator's gigantic face with its pulsing temples." She also notes that their mutated voices require translation devices, describing "the singsong ululations of the Navigator's voice with its simultaneous mechtranslation into impersonal Galach."