Space Pirate Ship

The Space Pirate Ship (宇宙海賊船 Uchū Kaizokusen) is the vehicle used by the Space Pirates of yore. It has boosters on its stern and its sails collect solar energy.

The Headmasters cartoon
After the Space Pirates' plundering of proton energy stopped and the pirates ceased to be, the Space Pirate Ship drifted to become one of many ships in the Space Graveyard. Still, a skull on its bow emitted a faint signal.

While the Autobots passed by the Space Graveyard on Battleship Maximus, Daniel Witwicky pointed out the Space Pirate Ship. After a closer look, Highbrow noted the signal from the skull.

Later, in hunt of a store of proton energy, the Autobots returned to the Space Pirate Ship, this time to retrieve the skull, which was the key to the front door of the proton energy storage.