The USS Tau-B was a Federation Excelsior-class starship in service in the 24th century, and the direct successor of the USS Tau-A, under the command of Captain Vickardt van Grottus. In the most time patrolled the ship on the Romulan Neutral Zone and escort other space crafts for Romulans descents. But the primary duty was to scan permanent the neighbor sectors for all strange occurrence.