No-ship
A starship invisible to prescience, navigating by its own calculation systems rather than by a Guild Navigator's foresight.
A no-ship is a starship that prescience cannot see, a no-chamber built to travel. Neither its movements nor the people inside it register to anyone who sees the future, Guild Navigators included, and its calculation systems are good enough that it needs no Navigator to keep it from running into anything. In standby mode the hull is visible to the naked eye while what is inside stays hidden. Sizes run from small experimental craft up to vessels colossal enough to live aboard for years without the effects confinement usually brings. Some are armed and fight. Some sit in orbit as planetary defence. Between the calculation systems and the blindness it imposes on oracles, the no-ship marks the fading of two things at once: the restrictions on thinking machines, and the Guild's hold on space.
How far into Dune have you read?
Set your place and this page rewrites itself to exactly that point. Nothing ahead of you will show.