Xanthium (Movie)

The Xantium is an Autobot transport ship built and designed by the Wreckers, it brought the second wave of Autobots to Earth.

""We designed the damn thing, didn't we.""

- Roadbuster refers to how the Autobots knew how to fake their deaths using the Xantium.

Dark of the Moon film
Upon discovering the existence of the of the long lost Autobot ship, the Ark, Optimus and Ratchet fly to the Moon in it to recover Sentinel Prime, who is in stasis-lock in the ships hold. They also recover five of the activation pillars for the Space bridge, including the Control Pillar.

After being forced to leave the Earth, the Autobots board the ship before it was destroyed by Starscream. Unknown to the human and Decepticons, the Autobots fake their own death by hiding in the first rocket booster pod to be jettisoned from the space craft. It fell safely back to Earth and landed in the Atlantic Ocean thanks to Leadfoot.