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For other uses, see Yamaguchi.

The Yamaguchi class was a Federation starship class in Starfleet service since the 24th century. The Yamaguchi was a sub-class of the Ambassador-class heavy cruiser. In the 25th century, a new prototype was launched and this subclass became officially known as the Yamaguchi-class fleet support cruiser retrofit. (ST reference: The Star Trek Encyclopedia, STO mission: "Temporal Ambassador")

History and specifications[]

The Yamaguchi's hull sported several changes and improvements over the regular Ambassador-class starship. The bussard collectors received caps on top and below. The nacelle pylons were shortened. The saucer section was planted further back on the neck. Some models included an additional shuttlebay below the aft shuttlebay. (ST reference: The Star Trek Encyclopedia, STO missions: "Temporal Ambassador", "Welcome to Earth Spacedock")

Ambassador- and Yamaguchi-class starships featured superior maneuverability compared to other heavy cruisers in the 25th century. (STO mission: "Temporal Ambassador")

Class variations[]

The USS Excalibur in 2376.

Subclasses[]

In the early 25th century, the Ambassador-class starship was available in three variants: support cruiser, retrofit and fleet retrofit. Differences among the subclasses were equipment, hull durability and power levels. Basic Ambassadors were cruisers commanded by officers with the rank of commander or higher. Retrofits were available to Starfleet officers with the rank of admiral. The fleet variant required support by a Federation fleet to be obtained. Only the fleet retrofit included the Yamaguchi subclass. The components saucer, hull, neck, pylons and nacelles were interchangeable between Ambassador- and Yamaguchi-class starships. (STO - Klingon War mission: "Welcome to Earth Spacedock")

With the launch of the Narendra-class support cruiser in 2410, the number of available interchangeable components increased to include the new ship class. (STO - Victory Is Life mission: "Welcome to Earth Spacedock")

Livery[]

By 2409, a number of basic livery designs was available to choose from, which could be modified further. These options were designated Types 1-7, Fleet, Fleet 2, Upgrade, and Veteran. (STO mission: "Temporal Ambassador")

In addition, the installation of shields from specific factions modified the hull appearance, including shields from the Reman Resistance, the Breen Confederacy and the Dominion. (STO missions: "Coliseum", "Cold Storage", "Boldly They Rode")

Known vessels[]

Ambassador-class explorer/heavy cruiser starships
Federation Starfleet
(primary universe)
standard configuration AdelphiAmbassadorAssuranceAuroraAyersChamplinCrescentCybeleEnterprise-CExcaliburExeterFuryGandhiGravinaHammarskjöldHannibalHardingHawkesburyHickokHoratioIndependenceIndianapolisIroquoisIsisKadoscaKrotusLoma PrietaMacDonaldMadisonManassasMonroeMontgomeryNormanQuiberonSeattleSheltonStrongThelianThornValdemarVelascoWarakurnaWilsonWinslowYamaguchiZarnitzaZhukov Emblem of the United Federation of Planets. Seal of the Federation Starfleet.
variant configurations Horatio-subclass: HoratioNarendra-subclass: NarendraYamaguchi-subclass: ExcaliburForrestalYamaguchiZhukov
Terran Imperial Starfleet
(mirror universe)
Horatiovariant configurations: AmbassadorRademaker Seal of the Terran Empire icon image.

Appendices[]

Connections[]

Starship classes of the Federation Starfleet
subclass groups

Akira (AlitaArmitageThunderchild) • Ambassador (AlaskaNarendraYamaguchi) • Apollo (Akula frigate / light cruiser) • Cardenas (Buran) • Chesapeake (Mongrel) • Cheyenne (DakotaStargazer) • Concorde (Geneva battlecruiserPresidio) • Constellation (Challenger deep space explorer) • Chimera heavy destroyer (Manticore) • Constitution (AchernarBonhomme RichardTikopaiEnterpriseExeterExcaliburVesper31st century refit) • Crossfield (Glenn32nd century refit) • Danube (Yellowstone) • Decatur (Dreadnought) • Defiant (GallantIncursionNachthexenSao PauloValiantVigilant escort) • Dervish (GryphonHermes escortMaelstromTempest) • Destiny (NimbusOracleTrident) • Engle (Earhart) • Excelsior (BismarckCurryKirovNew JerseyResolute) • Galaxy (Andromeda (25th century)CelestialEnvoyGalaxy XMonarch cruiserRossVenture cruiserYamato dreadnought) • Hermes scout (CygnusMonoceros) • Inquiry (Avenger battlecruiserArbiter) • Hoover (Edison) • Intrepid (BellerophonCochrane science vesselDiscovery (science vessel)JanewayPathfinderTrailblazerYeager) • Kumari (CharalKhyzon) • Luna (CometPolarisSolTitan) • Magee (Shran (escort)) • Malachowski (Helios (tug)) • Miranda (AntonReliantSoyuz) • Nebula (Magellan) • New Orleans (Lafayette) • Nimitz (Europa) • Norway (Oslo) • Nova (AuroraQuasarRhode Island) • NX (ColumbiaPoseidon) • Oberth (ClarkeGagarin (23rd century)GrissomSagan) • Odyssey (VerityYorktown (cruiser)) • Olympic (HopeHorizon science vessel) • Prometheus (CerberusHephaestusHestiaPhoenix) • Ptolemy (DollondDopplerKeppler) • Remora (Charger) • Saladin (CochiseSiva) • Santa Fe (Newport) • Saber (GladiusRapierUshaan) • Sentinel (EmissaryNomad cruiserVanguard) • Shepard (Gagarin (25th century)) • Solanae (HeliosMontgomeryOmega) • Sovereign (ArchonImperialMajesticNoble cruiserRegent) • Steamrunner (AppalachiaZephyr) • Vesta (AventineRademaker) • Walker (GeorgiouShenzhou ) • Wells (EternalOuroborosVerne)

Emblem of the United Federation of Planets. Seal of the Federation Starfleet.
other named classes

AA classAakennAchillesAdvanceAegianAeolusAerieAkula destroyer / escortAmbassador HardinAndesAndorAndromeda (24th century)AngelouAntaresApacheAquariusArcherArchimedesArk RoyalArielAscendantAtroxAvenger (scout)BabcockBaderBakerBaton RougeBodeBolarusBonaventureBradburyBrentonCaliforniaCanadaCanopusCapellaCastorCentaurCentaurusCeresCestusChallengerChandleyChariotChimerChimera fast frigateChristopherClarke (25th century)Cle DanCochrane transportColumbiaCondor (raider)ContinentContortrixCopernicusCourageDaedalusDauntlessDeckerDefenderDeltaD'KyrDenevaDerfDrexlerDurrettEagleEclipseEdwardEinsteinEisenbergEl Doradofuture EnterpriseEpochEpsilonErewonEternalFederationFenlonFermiFijiFreedomFriendshipFrontierGagarin (24th century)GalenGallantGangesGenevaGenserGracefulGraysonGriffonGuardianGeminiHaleHermes fast cruiserHestonHoganHokule'aHorizon cruiserIcarusIlthirinIndomitableIntrepid (light cruiser)IowaIstanbulIwo JimaClass JJupiterKarekhKeithKethkinKievK'KmarakKolm-AnKorolevLarsonLauroLaweyaLegacyLenthalLexingtonLibertyLokiLoknarLondonMadisonMakinMannMarklinMarsMarshallM'BengaMediterraneanMercedMercury (courier)Mercury (escort)MerianMerian (3060s)MessierMeteorMidwayMissionMissouriMobulaiMoKalMoscowMulciberNarcineNautilusNelsonNiagaraNoble laboratory vesselNomad escortNorthamptonOberonOdinOdysseusOkinawaOppenheimerOrionOsakaOverfieldPaladin battlecruiserPaladin destroyerParliamentPaladin (24th century)PerseusPioneerPhalanxPhantomPhiladelphiaPinnaclePiperPolluxPortsmithPralimPremonitionProximaPyotr VelikiyPyreneesRakotaRanger battlecruiserRanger explorerRanger scoutRenaissanceRickenbackerRigelRochesterRoyal SovereignSagittariusSamsonSaturnSawyerScorpioScryerScyllaSequoiaSevaijenShiKahrSierraSolarSpringfieldSulekSurakSydneyTangentTheophrastusThomas PaineThucydidesThufirTiberiusTiconderogaUniverseTheseusTripperTritiumTyphonTyphoonUkoraUlyssesUralUtahVenture scoutVigilant scoutVoyagerWallenbergWambunduWei-FaWellingtonWilkersonWizardYamatoYorkshireYorktownZodiacunnamed

general type

Defiant pathfinderRaging QueenSun TzuValley ForgeFederation assault shipFederation cargo shipFederation colony shipFederation construction shipFederation cruiserdeep galaxy shipFederation freighterFederation frigateFederation galaxy shipFederation holoshipFederation heavy cruiser (2380s heavy cruiser) • Federation light cruiser (Constitution-variant light cruiserIntrepid-variant light cruiser) • Federation medium cruiser (Excelsior-variant medium cruiser) • Federation mining freighterFederation repair shipStarfleet tanker

External links[]


References[]


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