Zurka

Zurka was a male Klingon who served as first officer aboard the IKS veScharg'a in 2379. That year, the veScharg'a led a fleet of sixty Klingon vessels sent to Tezwa after the destruction of a smaller fleet four hours before. Zurka served at the tactical station in order to coordinate the assault with the other ships. Just as the veScharg'a was about to attack, the USS Enterprise-E used the Klingon Fleet Command codes to gain control of the entire Klingon fleet completely shutting down power on the ships. Zurka claimed that they had no explanation for the power failures, but Fleet Captain Krogan knew immediately that it was the Enterprise. (TNG novel: A Time to Kill)