The Apsac was an upgraded 11th gradient supertanker conceived by Controller Marssi. In addition to he reinforced tanks, the Apsac was equipped with seven separate shields to improve redundancy. These shields were enhanced further by a shield enhancer component. Among the Malon export vessels, the Apsac had the lowest incidence of theta radiation. The core laborers' survival rate reached sixty percent, twice as much as on other export vessels.