- See IKS Bortas (D5 class) for the D5 class vessel of the 22nd century.
The IKS Bortas was a Klingon Template:ShipClass attack cruiser that was in service with the Klingon Defense Force in the mid-24th century.
In 2366, the USS Enterprise-D was contacted by the Bortas when Captain Picard requested reinforcements prior to entering the Romulan Neutral Zone to investigate a potential Romulan military base on Nelvana III. (TNG: "The Defector")
The Bortas was later Gowron's flagship during the Klingon Civil War in 2367-68. It took heavy damage during a surprise attack by ships loyal to the House of Duras at the beginning of the war, but drove off the attackers with assistance from the IKS Hegh'ta. (TNG: "Redemption")
In late 2369, Gowron traveled aboard the Bortas to rendezvous with the Enterprise-D when the latter ship was transporting the reincarnation of Kahless the Unforgettable to Qo'noS. (TNG: "Rightful Heir")
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