The Imulsion Tanker, or simply Tanker, is a supply vessel used by almost all nations of Sera; this ship has a type of cylindrical-circular tanks in the deck which are used to refuel and transport Imulsion for several countries, including Tyrus and Gorasnaya. For the most part, Imulsion Tankers were used by merchants and civillians.
The Imulsion Tankers were easy targets for both superpowers - the COG and UIR - during the Pendulum Wars, turning these ships into easy targets for submarines. The Gorasni submarine Zephyr was designed to sink supply ships owned by the COG, mainly COG Imulsion Tankers, with the COG having the same objective against the UIR.
During the events of E-Day, a large number of Imulsion Tankers were stationed at harbors like Porta Ogari and the Endeavor Naval Shipyard. These ships were in operation until the Locust incursions in 12 A.E. at Endeavor forced the COG to sink or imobilize all of them, and set the Imulsion Stockpiles on fire.