This type of ship consisted of a habitable crew module attached to a garbage scow. The module, which could separate from the scow, was equipped with a tractor beam, but no weapons. These ships appeared to have a complement of at least three crewmembers.
In 2380, one of these ships was engaged in a heated dispute over abandoned Starfleet cargo with the USS Cerritos. During the conflict, the crew module was damaged by an animate isolinear core ejected from the Cerritos. (LD: "Terminal Provocations")