The Schirron Dream was a semi-sentient spaceship that Sgloomi Po used to escape the pocket dimension called the System and escape to the universe normally inhabited by Benny and the Doctor. Indeed, Benny herself was onboard the vessel during this journey. When the archaeologist later met up with Po, she reckoned that the Schirron Dream must surely be somewhere nearby. Indeed, Po was an actual crew member of, and not just a one-time passenger on, the Schirron Dream. Other crew members on the vessel were Leetha, Nathan and Kiru. (PROSE: Oblivion)
