The USS Khaleesi was an Excelsior class cruiser that served in the Sixth Fleet during the Dominion War.
She was badly damaged and adrift after the assault on Geltrik Nor. After the battle she was towed to one of the captured station's drydocks. ("Narkonna")
Due to scarcity of resources due to the war, the ship's port nacelle was not repaired and Khaleesi was staffed with a skeleton crew and assigned to the station as a defense vessel.
After the war she was transferred to the Bajoran Space Guard and served as their flagship even though the nacelle had still not been repaired. ("Gatekeeper")