Retrorockets, also known as retro thrusters, were a type of rocket on starships which could be used in atmosphere, and were found on ships such as the Tribunal, Millennium Falcon, and Razor Crest. In 19 BBY, the Venator-class Star Destroyer Tribunal, en route from Mandalore to Coruscant, was thrown into turmoil as a result of the execution of Order 66. During the fighting, the ship fell out of hyperspace when a former prisoner on board, the renegade Sith Lord Maul, destroyed its hyperdrive, sending the Star Destroyer onto a collision course with a nearby moon. As the stricken vessel entered the moon's atmosphere, a bridge officer called for the retrorockets to be fired, but was told that they had lost lateral control just before the bridge exploded.