Nygean prison ship

From Memory Alpha, the free Star Trek reference

A Nygean prison ship was a starship operated by the Nygean Detention Force to transport prisoners from one planet to another, sometimes for execution.

Nygean ships were capable of warp 8.2.

In 2377, a prison ship under the command of warden Yediq suffered a reactor breach. Luckily, the crew was rescued by the USS Voyager, which was nearby when they issued a distress call. Its (surviving) complement was comprised of three Nygean guards, three Nygean prisoners, and five Benkaran prisoners. (VOY: "Repentance")

For more information on this CGI model design, please see VOY studio models.