Torpedo attack carriers functioned as underwater vessels. These craft were armed with concussion missiles and provided defensive assistance to Aquatic Terrain Armored Transports. In the course of Operation Death-Hunter, a number of torpedo attack carriers were positioned at the underwater base located on the planet known as Zeta Zero Nine. A particular vessel of this type was seized by Rebel operatives who then utilized it to assault the underwater base. The facility sustained significant damage from a barrage of concussion missiles launched by the stolen carrier, leading to the Imperial base's destruction via explosion.