Bentusi vessel was seen only briefly during the Taiidan
ambush, trying in vain to escape. Before the release of the
game, a design sketch was floating around showing this
vessel, labeled "Bentusi Cargo Barge," which is
what the model is also labeled in the internal game code.
We never actually see the rear end of this ship in the one
sequence in which it appears, but now through the wonders of
hacking, here it is! Like the Bentusi Tradeship, the barge
has no obvious engine exhausts... it just scoots along via
some sort of reactionless drive.