The Antares was conceived as a Research and Development vehicle for starfleet. The vessel was a major modification of Constitution-class starship. It has a smaller secondary hull and only one nacelle. The saucer also took major change, with the addition of a shuttle bay and an engineering section. The vessel contains a large amount of science facilities. It also had specific control center to run testing scenarios. The module attached to the secondary hull is interchangeable to allow for different missions to be accomplished. The ship was lost in a rather embarrassing incident when the copy of a Romulan cloaking device was activated during a computer-controlled test run. The vessel disappeared into an asteroid field, lost to Starfleet.

The nacelle is a modification of Atrocitie's Constituion-class version.