Arc II

he Arc II is an Autobot spaceship. Hidden under the Pacific Ocean 74 miles off the coast of California, the Arc II serves as the base of operations for a small unit of Transformers operating under the human Hawk.

G.I. Joe vs. the Transformers
The Arc II was the command center of Hawk's effort to keep Cybertronian technology out of human hands. His contingent helping him included the human Firewall and Autobots Prowl, Sideswipe, Skids, Cosmos and Eject.

The Arc II was attacked by the Decepticon Pretender Monsters after the Autobots were exposed to spores from Nyarath eggs, allowing Cobra-La to track them back to the base.