The Hirogen use these vessels for hunting their prey, and Voyager has encountered them several times. They are relatively small for the distances they cover, and usually seem to carry a crew of only one or two Hirogen. Although apparently not warships as such, the vessels are well armed and armoured. They are not a match for the Intrepid class unless at least two or three join forces.

Voyager has established that these vessels use monotanium in their hull construction, and have a dicyclic warp system. Their layout is fairly conventional, with an engineering hull flanked by two nacelles and a primary hull in front. There is a sublight impeller at the rear of the engineering hull and secondary impellers at the rear of each nacelle. The nacelles themselves have six warp coils each, with a bussard-style matter collector at the forward end. They are protected by an armoured carapace. The primary hull has a combination sensor and weapon array in the bow. Aft of this is a bridge unit located on the dorsal surface, flanked by structural hull reinforcements. The aft of the primary hull mounts weapon turrets, while the short connecting neck between primary and engineering hull has a sensor array and defensive shield emitters on it.

The overall design is relatively compact, presumably to make it robust in the face of enemy fire.