The coaxial warp ship was a small, lightly-armored starship which could be operated with a single pilot. It was equipped with an experimental propulsion system known as a coaxial warp drive.
In 2374, the crew of the USS Voyager encountered this ship while it was emerging from coaxial warp, and assisted with repairs to its propulsion systems. (VOY: "Vis à Vis")
It is unknown whether this ship was of Benthan design, whether it belonged to Steth or if it was the DNA thief's.