Synthesized Operating Layer, Grid-Based Drive Array, shortened as SOL-GDA, was the Intellectual Processing Unit (IPU) for the prison ship Ashmead's Lock. Ashmead's Lock and SOL-GDA were constructed by the Predori, a rogue empire that opposed the Galactic Republic millennia prior to the Galactic Civil War. The unit could speak multiple languages, including Galactic Basic Standard, Ithorese, Gand, Huttese and Zabraki. Hidden in a gravity well, the ship crashed on the nearby planet Kashyyyk after the well collapsed on itself. SOL-GDA remained intact, however, and continued to operate even after the Galactic Empire took control of Ashmead's Lock and had it modified and rebuilt.