The Hermes-class was a type of 23rd century Federation scout-type starships operated by Starfleet. The Hermes consisted of a saucer section and nacelle, each similar in exterior design to that of a Constitution-class vessel of the 2260s. Its configuration was significantly different, however, as it employed only a single nacelle. (Star Trek II: The Wrath of Khan, Star Trek III: The Search for Spock)