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NX

From Memory Alpha, the free Star Trek reference

Multiple realities
(covers information from several alternate timelines)
The NX-Alpha in 2143
The USS Defiant (NX-74205) in 2373
See also the NX class, a prototype class of starship.

NX is a starship registry number prefix in use by both the Earth and Federation Starfleets.

In the Earth Starfleet it was used to represent the NX class starships. (ENT: "Fortunate Son")

In the Federation Starfleet, they came to be used by experimental starship designs that typically became the first starship (or prototype) of their class. (Star Trek III: The Search for Spock)

[edit] Ships with an NX registry

Ship Name Registry Class Commander(s) Dates Notes
none NX-Alpha NX class prototype Commander A.G. Robinson 2143 First Earth ship to surpass warp 2 (ENT: "First Flight")
none NX-Beta NX class prototype Commander Jonathan Archer; Commander A.G. Robinson 2143 First Earth ship to surpass warp 2.5 (ENT: "First Flight")
none NX-Delta NX class prototype Commander Duvall 2144 First Earth ship to surpass warp 3 (ENT: "First Flight")
Enterprise NX-01 NX class Captain Jonathan Archer 2151-2161 First Earth ship with a warp five engine (ENT: "Broken Bow")
Columbia NX-02 NX class Captain Erika Hernandez 2154 none (ENT: "The Expanse", "")
USS Excelsior NX-2000 Excelsior-class Captain Styles; Captain Hikaru Sulu 2285-2370 First Starship equipped with transwarp (failed); registry changed to NCC (Star Trek III: The Search for Spock)
USS Constellation NX-1974 Constellation-class unknown 2293-2374 Registry later changed to NCC-1974 (Star Trek VI: The Undiscovered Country)
USS Bradbury NX-72307 Bradbury-class unknown 2366-2367 none (TNG: "Ménage à Troi")
USS Defiant NX-74205 Defiant-class Commander/Captain Benjamin Sisko 2370-2375 First Starfleet vessel built only for combat (DS9: "The Search, Part I")
USS Prometheus NX-59650 Prometheus-class unknown 2374 First starship with multi-vector assault mode (VOY: "Message in a Bottle")
USS Dauntless NX-01-A Dauntless-class Arturis 2374 Decoy ship; first starship with quantum slipstream technology (VOY: "Hope and Fear")


[edit] Mirror universe ships with an NX registry

Ship Name Registry Class Commander(s) Dates Notes
ISS Enterprise NX-01 NX class Captain Maximilian Forrest; Commander Jonathan Archer 2155 Flagship of the Terran Empire (ENT: "In a Mirror, Darkly")
ISS Avenger NX-09 NX class Admiral Black 2155 Admiral Black's flagship (ENT: "In a Mirror, Darkly, Part II")
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