In 95 AG, Tyro was brought to this prison after revolting against Fire Nation troops in a mining village. Five years later, he was followed by his son, Haru, who was tracked down by Katara to the rig in a rescue attempt. She was shocked to see how hopeless and deprived the prisoners were, and felt compelled to give them a motivational speech. Nevertheless, the prisoners continued to sulk, quickly dismissing Katara's words. During the battle on the rig, Katara lost her mother's necklace. It was later recovered by Prince Zuko, who came to the prison rig some time after Team Avatar's departure.