By the year 2269, Yataro had been assigned to the USS Endeavour as chief engineer, replacing Bersh glov Mog, who had died from radiation poisoning when engineering had been breached during the ship's defense of Starbase Vanguard from a Tholian armada at the Battle of Vanguard the previous year. (VAN novel: Storming Heaven, Seekers novel: Second Nature) He later assisted with repairs on the Klingon battlecruiser IKS Voh'tahk. (Seekers novel: Point of Divergence)