Questor was a Lambda-class T-4a shuttle that was used by the Galactic Empire. In about 18 BBY, the Sith Lord Darth Vader traveled to the planet Mandalore aboard Questor in the aftermath of his capture of the Whiplash resistance leader Thi Xon Yimmon, to pick up equipment on the world that could be used to imprison and interrogate Yimmon.