The Groumall-type was a type of starship utilized throughout the Cardassian Union during the late 24th century. During the early 2370s, this class of vessel, was utilized primarily as a freighter or transport, and occasionally fielded by the Cardassian Central Command. The Federation retained knowledge of this class, dating back to the early 2370s. A graphic display of a military freighter appeared on the USS Voyager's library computer screen that was viewed by One after Seven of Nine had activated the drone's linguistic database, and allowed him to assimilate information. (VOY: "Drone")