The Ramuran vessel was a type of starship used by the Ramuran people in the late-24th century. Ships of this type were fitted with sophisicated cloaking devices and proton particle weapons which could fire when cloaked.
In 2374, Kellin piloted a vessel of this type in an effort to return to the USS Voyager where she had previously fallen in love with Commander Chakotay. She was successful in returning, however the ship was later attacked by two more cloaked vessels of this type. It was only by modifications to the sensor array that Voyager was able to detect the ships, which soon retreated. (VOY: "Unforgettable")