Also known as lightships, nullships are peripatetic virchworlds with a 'crew' of virtual sophonts wandering the Lightways. The Nullship represents a stable environment for a virtual sophont to inhabit, and as a base for interactions with the local cybercosm.
Nullships may spend days to years in a Lightway Inn before travelling onwards. In the Outer Volumes, especially, the arrival of a nullship can be a significant event. Nullships can be carried beyond the Lightway network inside dataships, or even as cargo inside a peripatetic ISO.