This page details a counterpart of Constitution class in the Kelvin timeline; for the Constitution class in the primary universe see Constitution class; for the Constitution class in the mirror universe see Constitution class (mirror); for the Constitution class in the mirror universe of the Kelvin timeline see Constitution class (mirror) (Kelvin timeline); for the Constitution class in all other alternate universes see Constitution class (alternates).

The Constitution-class was a type of starship operated by the Federation Starfleet as a heavy cruiser and flagship[1] in the 2250s[2] of the Kelvin timeline created by the temporal displacement of the Narada. One notable member of the class was the USS Enterprise, which launched in 2258.


The class featured a saucer section connected by a neck on the rear of the saucer which ran down into the vessel's engineering hull. The primary hull contained the bridge on A-deck, officer and crew quarters on D and E-decks, a personnel transporter room on F-deck, and sickbay on G-deck. The saucer section was also fitted with six phaser battery placements, three dorsal and three ventral, with two batteries at each placement. The saucer section could also be separated in emergencies. The ship has a total of 36 decks, 17 at the saucer and 19 at the rest of the ship. (TOS website: Experience The Enterprise; TOS movie: Star Trek; TOS - I, Enterprise! comic: "I, Enterprise!, Part 1")

The secondary hull housed the ships' engineering facilities, with primary engineering control on N and O-decks, including the vessels' matter-antimatter injection mix warp core, which powered the vessels' warp drive and phasers. At the fore of the secondary hull was the class' navigational deflector, above which were twin type 4 photon torpedo launch tubes. R-deck included the ships' cargo bay and hangar bay, which could house sixteen shuttlecraft. The secondary hull also featured the classes pylons, connecting to twin model FWG-1 warp nacelles. (TOS website: Experience The Enterprise)

Like its contemporaries, the Arbiter-class, Defender-class, Guardian-class, and Interceptor-class, the Constitution-class could, in addition to its standard systems, be armed with quantum torpedoes, and the ability to temporal shift. (TOS video game: D-A-C)


The Constitution-class was designed by W. Matt Jefferies. Construction of the USS Enterprise was conducted at the Riverside Shipyard in Iowa on Earth, and was well underway by 2255. The Enterprise was also built at the San Francisco Fleet Yards, and had been launched into space by 2258. Her maiden voyage took place in that year, prematurely due to her being called into action in response to the Narada's attack on Vulcan. (TOS website: Experience The Enterprise; TOS movie & novelization: Star Trek)

In the 2250s members of the Constitution-class were part of the Starfleet force that battled starships of the ktar|Romulan Star Empire}}. (TOS video game: D-A-C)

When incursions caused by the Na'kuhl and the Sphere Builders of the primary universe allowed this universe to be seen, members of the Federation of the year 2410 decided to build these ships in their universe, noting that the technology seen here was as modern as theirs, despite the alternate universe being over 150 years into the past. (Star Trek Online)

Known vessels

Mirror universe



  1. 1.0 1.1 The Experience The Enterprise website identifies the USS Enterprise as a heavy cruiser, while the video game D-A-C classifies members of the Constitution-class as flagships.
  2. 2.0 2.1 The movie Star Trek features the launch of the USS Enterprise in 2258. While it is not known whether other Constitution class vessels may have already launched at this time it is notable that the class marks a new style of Starfleet design, with all other ships seen in the film built from components similar in design to the much older USS Kelvin, which would seem to indicate the Constitution-class is at the very least a relatively new design at this point.
  3. 3.0 3.1 3.2 3.3 The USS Enterprise dimensions, weight, and crew complement are given on the Experience The Enterprise website.
  4. The Enterprise's shuttle complement is given on the Experience The Enterprise website. The video game D-A-C includes a feature allowing a player to launch an "escape pod" when their ship is about to be destroyed, permitting them to respawn and continue playing quicker. The escape pod design for all Federation ships in the game is a military shuttle.
  5. 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 In D-A-C starship names are selected and allocated at random. The game features eleven Federation starship names which are assigned randomly to all classes of ships in the game. All Constitution-class names from D-A-C are therefore also known as the names of vessels of the four other Starfleet classes in the game.


Variants and sub-classes of the Constitution-class starship
UFP seal Constitution-class (mk I) • Bonhomme Richard-class (mk II) • Achernar-class (mk III) • Tikopai-class (mk IV) • Enterprise-classes (mk I-III refits) • Exeter-class (24th century) • Constitution-class (Kelvin timeline) • Constitution-class (mirror universe) Starfleet Command logo
Federation Starfleet starship classes (Kelvin timeline)
UFP Kelvin seal ArbiterConstitutionDefenderDreadnoughtEinsteinGuardianHermesInterceptorSaladinsee also: unnamed Federation starship classes (Kelvin timeline) 2250s alt cmd badge

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