Memory Alpha
Memory Alpha
For the VOY episode of the same name, please see "Prototype".
USS Defiant (NX-74205), quarter view

The USS Defiant, prototype of the Defiant-class

A prototype was the common designation for a first working model of a new invention, used for trial runs.


In 2371, the Obsidian Order tested a prototype quantum stasis field, which prevented a Changeling from altering its biomolecular structure. (DS9: "The Die is Cast")

In 2373, Starfleet Science developed a prototype of a device called a polaron emitter, designed to expose Changelings by rendering them unable to maintain solid form. The untested nature and the complicated means of placement and activation made Miles O'Brien remark: "I hate prototypes". (DS9: "Apocalypse Rising")

Concerning starships, Starfleet prototypes had an "NX" prefix in the registry number, as opposed to the normal "NCC" prefix, and which were typically the first vessels in their class. (Star Trek III: The Search for Spock; DS9: "The Search, Part I"; VOY: "Non Sequitur", "Message in a Bottle") Once certified for operational status, however, these prototype vessels usually reverted to a more standard NCC prefix. (Star Trek VI: The Undiscovered Country; DS9: "Tears of the Prophets"; Star Trek Nemesis)

Prototype ships[]

Andorian Imperial Guard[]


Klingon Defense Force[]

Romulan military[]


22nd century[]

23rd century[]

24th century[]


Background information[]

During production of Star Trek: The Original Series, Star Trek: Phase II, and Star Trek: The Motion Picture, several prototypes of the USS Enterprise, both in her original and refit configurations, were built.

During production of Star Trek III: The Search for Spock, several USS Excelsior prototypes were built.

During production of Star Trek: Voyager, a USS Voyager prototype mock-up model was built.

See also[]

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