The USS Defiant was equipped with a holofilter. In 2371, to enter Cardassian space, Commander Benjamin Sisko used one to make himself appear to be a Kobheerian captain to Cardassian patrols. (DS9: "Second Skin") Gul Dukat's Klingon Bird-of-Prey was also equipped with one. In 2373, when he transported Worf, Sisko, O'Brien, and Odo to Ty'Gokor, he replaced his image with that of a rather imposing Klingon. (DS9: "Apocalypse Rising")