An enormous vessel available to Dominion players in Star Trek Online, the Vanguard-Class Jem'Hadar Carrier acts as a mobile assault base for the launch and repair of its accompanying fleet, with a long dorsal flight deck from which two wings of gunboats can be launched.

The Vanguard-Class Carrier is a keystone of the Vanguard Fleet, the personal detachment of Dominion starships and soldiers that accompany the changeling known as Odo. As one of the few Founders with an affinity for life as a solid, he was placed in command of this fleet in an effort to combat the re-emerging Hur'q threat.