The Thranta was a starship that belonged to the Survivor Fleet, which was a fleet made up of Alderaanians who had lived through the destruction of their planet, Alderaan, by the Death Star. These survivors were rescued by the rebels Leia Organa and Evaan Verlaine. Between the years of 3 ABY and 4 ABY, a group of raiders in service to the former Galactic Empire commander Ellian Zahra, who sought revenge against Organa, attacked the Survivor Fleet. This attack led to the destruction of a number of the fleet's ships, and the Thranta was seized.
Zahra devised a scheme to ensnare Organa, leaving the Thranta seemingly deserted except for the Preserver Jora Astane. Astane was dead, but she was linked to machinery that kept her body active enough to register a life sign. When the Survivor Fleet missed several scheduled communications, Verlaine, Organa, and Luke Skywalker went to investigate the fleet's last known coordinates. There, they came across the Thranta, and Organa and Skywalker boarded the ship, where they discovered Astane's corpse. Subsequently, Zahra's raider forces arrived and commenced an assault on the Thranta. Skywalker escorted Organa to an escape pod, but the Thranta was destroyed shortly thereafter. Zahra's forces captured Organa's escape pod and brought it aboard one of her ships. Skywalker, who had also managed to get into an escape pod, was recovered from the wreckage of the Thranta shortly afterward. Ultimately, the rebels triumphed over Zahra, and Organa later found out that most of the Survivor Fleet had managed to escape.