A Guild Navigator (alternately Guildsman or Steersmen) is a fictional humanoid in the Dune universe created by Frank Herbert. Humans mutated through the consumption of and exposure to massive amounts of the spice melange, they are able to use a limited form of prescience to safely navigate interstellar space in a starship called a heighliner.
Read more about Guild Navigator: Description, Prequels, Emperor: Battle For Dune