No-ships came into heavy use during and after the time of The Scattering. They were used by people fleeing the Old Imperium into the vast unknown of uncharted space. Since no-ships possessed advanced calculation systems, they did not require a Guild Navigator's prescient abilities to avoid collision with interstellar bodies. Because of this, they could escape charted territories without difficulty. However, this also meant that they came dangerously close, if not outwardly defied, the prohibition of the use of thinking computers.