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Memory Beta, non-canon Star Trek Wiki
Memory Beta, non-canon Star Trek Wiki
For other uses, see Poseidon.

The USS Poseidon (NCC-8472-U) was an Undine bioship, a dreadnought in the form of a Defiant-class escort in service in the 2400s decade. It was a counterpart of the Federation Akira-class starship USS Poseidon and commanded by a Captain Akira Sulu impostor. (STO - Special Task Force mission: "Undine Terradome")

History and specifications[]

The Poseidon-U was equipped with antiproton beam arrays and Undine plasma torpedoes. Its capabilities matched or exceeded those of a Tethys-class bio-dreadnought.

In 2409, the Poseidon-U was assigned to the Terradome in the NGC-4447 system, located in the Gamma Orionis sector block.

Around that time, the USS Intrepid was lost three parsecs from this system.

When a genuine Starfleet/Klingon Defense Force task force, consisting of five ships, entered the system one month later, Captain "Sulu" stated this area was quarantined and threatened to resort to violence. When the task force failed to comply, the Poseidon attacked. The Undine dreadnought was so powerful it could hold its own against the five Allied ships.

During the battle, the Poseidon morphed into other Undine ships before returning to its native form as a Defiant escort.

When the Allies had whittled its structural integrity field down to 25%, the Poseidon-U retreated towards the terrasphere and summoned reinforcements, including Tethys-class dreadnoughts, Nicor-class battleships and Dahut-class frigates.

The Poseidon patrols the Terradome.

Following their defeat, the Poseidon-U returned to the fray but was destroyed. Captain Sulu transported to the Terradome, where the real Akira Sulu was held captive by another six impostors. With the terrasphere's defenders eliminated, a boarding party consisting of the Allied ships' five captains beamed aboard the Terradome to pursue the Undine. (STO - Special Task Force mission: "Undine Terradome")



Ships named Poseidon
Federation Starfleet
(primary universe)
USS Poseidon (NCC-200, Poseidon-class)USS Poseidon (Mann-class)USS Poseidon (NCC-26296, Miranda-class)USS Poseidon (Akira-class)see also: Poseidon-class UFP emblem image. Seal of the Federation Starfleet
(fluidic space)
USS Poseidon (NCC-8472-U, Defiant-class) Seal of the Undine.
Defiant-class destroyer/escort starships
Federation Starfleet
(primary universe)
standard arrangement AjaxAlaskaAlbatrossAldebaranAlexey LeonovArmstrongArk RoyalAvengerBaracusBarracudaBaton RougeBelfastBenningtonBoxerChampionCheyenneCobraConcordCondorCormirCorvusCrockettDauntlessDefiant (I)Defiant (II)Defiant-CEagleEclipseFalkirkFargoFormidableFranklinGallantGalahadGauntletGawainGrantHalberdHavocHelenaHorizonHornetHurricaneIllustriousIncessantIwo JimaJavelinKantKingfisherLawLeeLeyteLoganLokiMan-o-WarMatadorMayaMedvedevMerrimackMichiganMongooseMonitor (I)Monitor (II)MonsoonMorganaMoscowMyrmidonNarcissusNeptuneNomadPendragonPleiadesPotemkinPythonQuillonRamsesRangerRavenRedoubtableRelentlessRenegadeRevereRockfordRomeSaladinSao Paulo (I)Sao Paulo (II)SavannahScorpionSiouxSiroccoSnake EyesSpitfireStalwartStrommingTenaciousThorTiconderogaTitanTreplevTriumphTritonTsunamiTurinValiant (I)Valiant (II)ValorousVanyaVictoriaVictoriousVigilantVoltaireWarspiteWaspWolverineZeppelin Federation icon image. Starfleet Command icon image.
other configurations Gallant-subclass: GallantIncursion-subclass: IncursionSao Paulo-subclass: IndefatigableNikeSao Paulo-AValiant-subclass: Valiant (III)Vigilant-subclass: DefiantStalwartVigilant
mirror universe Terran Rebellion Capital GainDefiantJadziaTerra Victor Terran Rebellion icon image.
Terran Empire DefiantDefiant-CSao Paulo-subclass: Quantum Terran Empire icon image.
Species 8472 Poseidon-U Undine icon image.


  • The registry NCC-8472-U is an in-joke: Species 8472 is the Borg designation of the Undine. It may also indicate the Poseidon was the 22nd ship to bear the name and registry number.
  • The Poseidon rotated between the various Undine starships classes during the battle.
  • When Commander Akira Sulu was promoted to Captain, he served on the genuine Poseidon, patrolling the Romulan Neutral Zone, until he returned to his post at Earth Spacedock.

External link[]