Dimension 7 was an alternate dimension which Androssi Overseer Biron used to store equipment and materials. In 2376, his crew performed a number of equipment upgrades to a Yridian trader's ship in exchange for information on the crew of the USS da Vinci. Once the exchange was complete, Biron ordered the dimensional blockers engaged, causing all the material installed on the Yridian ship -- including an antimatter containment unit, but not its antimatter -- to be returned to Dimension 7. (SCE eBook: War Stories, Book 1)