An eco tanker is a large airship featured in Jak II. It was a large, truck-like vehicle used to transport eco, either in standard barrels or in large, round containers. They were used by Baron Praxis, specifically the Krimzon Guard, as a means for satisfying the ongoing deal between the Baron and the Metal Head leader. A group of metal heads once managed to steal a tanker and used it to ambush Ashelin Praxis, a few guards, and Jak, who happened to be present in the eastern Bazaar. This event gave rise to the mission "Intercept tanker", which Ashelin described as a way of the Metal Heads testing Haven's defenses. Eco tankers were again featured while docked at the weapons factory: Krew and Baron Praxis evidently planned to use one to transport the piercer bomb with the Precursor Stone insid