Shuttle S257, a Sentinel-class landing craft utilized by the Galactic Empire's Imperial Navy, was appropriated by Phoenix Cell rebels around 4 BBY. This shuttle subsequently served Kanan Jarrus and Rex during their operation targeting an experimental Interdictor-class heavy cruiser, with the objective of extracting Jarrus' Padawan, Ezra Bridger, together with Commander Jun Sato.
As a Sentinel-class landing craft, Shuttle S257 featured both a hyperdrive generator and a communications array, the latter of which allowed it to interface with the communication systems of an Interdictor-class heavy cruiser. Furthermore, the shuttle possessed integrated weaponry situated near its front-facing ramp and on its adjustable wings.