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Memory Beta, non-canon Star Trek Wiki
Memory Beta, non-canon Star Trek Wiki

The Birok class was a 24th century[5] Klingon starship type, a Klingon Empire strike cruiser[6] and later tier 5 heavy raptor[7] class in Klingon Defense Force service from the 24th century to the 2410s[8] decade. (TLE novel: The Art of the Impossible, STO - Empire mission: "The Hunt is On")

History and specifications[]

The Birok class had entered service by the early 24th century.

As strike cruisers, Biroks lacked the firepower and endurance of full battle cruisers, but in packs or supporting heavier ships they could be quite effective.

In 2328, Biroks were part of the Klingon forces clashing with the Cardassian Union over Raknal V, commencing the years-long Betreka Nebula Incident. (TLE novel: The Art of the Impossible)

Birok-class strike cruisers continued service during the Dominion War of 2373-2375. By the late 2370s decade, their design was dated and the more modern Karas-class strike cruiser began replacing the Birok. (GKN novel: Honor Bound)

In the early 25th century, the 22nd century raptor escort experienced a renaissance in the Klingon Defense Force. By 2409, several raptor classes across different starship tiers had returned to service and saw action in the Federation-Klingon War of 2405-2410.

Among those was the tier 5 Qin-class heavy raptor, a larger version of the lean tier 1 Somraw-class raptor. Like Starfleet, the KDF ships had become modular, with components being interchangeable between classes. The Birok was revived as a heavy raptor, sharing equipment, capabilities and modularity with the Qin, including an emplacement for an experimental weapon. (STO - Empire mission: "The Hunt is On")

Later in 2409, the Qa'Tel-class tier 6 flight deck raptor was launched. The Qa'Tel-class components became interchangeable with those of the Qin and Birok. Upgraded with a flight deck, a tier-6 Birok could launch a wing of To'Duj-class fighters to aid in combat and could fire a destabilized tachyon burst. (STO - Under Siege mission: "The Hunt is On")

By default, this class was fitted with Mk-rated scaling shield array, deflector array, impulse engines, and matter anti-matter warp core. At tier 6, fore weapons included a pair of disruptor dual cannons, a disruptor beam array and one photon torpedo launcher. The three aft weapon slots were filled with another beam array, and two torpedo launchers.

Like all 25th century Klingon ships, this class was equipped with a cloaking device.

As a type of carrier, the Birok could direct its hangar pets to attack hostile targets, escort a friendly target, intercept munitions and hostile fighters, and recall for repair and refueling. (STO - House Divided mission: "The Hunt is On")

In the mirror universe, the Klingon Alliance deployed tier-5 mirror Qin heavy raptors, which were painted in a unique livery. This livery and the hull modularity extended to the Birok class. (STO - Under Siege mission: "The Hunt is On")


In the 25th century, the hull design of the Birok-class heavy raptor allowed its commanding officer to choose from different livery materials. These could be modified by Klingon shipyard operations. The material options included numbered Types, Upgrade, Veteran, Fleet, and Mirror. (STO - House Divided mission: "The Hunt is On")

Birok hull materials:

  • Type 1
  • Type 2
  • Type 3
  • Type 4
  • Mirror
  • Upgrade
  • Veteran
  • Fleet

Furthermore, the installation of deflector 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[]



Klingon raptor escort starships
Klingon Empire, Defense Force
(primary universe)
Somraw-class raptor IKS Amw'IIKS BalthIKS BarakIKS BokorIKS Dit'kraIKS GantinIKS K'araHIKS K'eylatIKS Nu'paHIKS Nu'TalIKS PatanIKS R'moraIKS Rok'lorIKS SomrawIKS VengIKS Worvig KDF insignia icon image. Klingon Empire insignia icon image.
Qorgh-class tier-3 raptor IKS QorghSuQob-subclass: IKS SuQob
Pach-class tier-4 raptor IKS PachPuyjaq-subclass: IKS Puyjaq
Qin-class tier-5 heavy raptor IKS TargkIKS QinBirok-subclass: IKS Ch'marqIKS BirokIKS DogalIKS KazinQa'Tel-subclass: IKS Qa'Tel
Mat'Ha-class tier-6 raptor IKS Mat'Ha
pilot raptor Klovek-subclass: IKS KlovekKortar-subclass: IKS KortarQui'Tu-subclass: IKS Qui'Tu
Qa'Tel-class flight-deck raptor IKS Qa'TelBirok-subclass: IKS BirokQin-subclass: IKS Qin
Ketha-class recon raptor IKS Ketha
Klingon-Cardassian Alliance, Klingon Alliance
(mirror universe)
Qin-class mirror heavy raptor AKS QinBirok-subclassQa'Tel-subclass KCA insignia icon image. Klingon Empire insignia icon image.
Klingon starship classes
Klingonese names AkifAn'quatBaSro'BatlhBre'elB'relB'RotlhBaka Re'Ber'taaBesz Ra'te'BirokBortasBortaS bIrBortasqu'Ch'TangCharghCharghwI'Chava'KalChontayChunDabChuq'BehChutokDaSpuD'akaD'amaDath D'lanD'esta KarD'GavamaDujHodEakin K'nallFek'lhrFer'JaiH'ban PavHaqtajHegh'taHoH'SuSJachJach'EngJfolokhKlinzhaiK'mirraK'nallK'nelK't'aggaK't'allaK't'ingaK't'karaK't'maraK't'rikaK'TancoK'vortK'vort ChaKalathKamaragKarasKas MaalK'el Ri'andaKh'exrilinK'hanakhKhitomer (bird-of-prey)Kl'arKlolodeKl'sarzaKl'xenovaKolothKom Ka'desKomo ValKorathKorebaKoro't'ingaKronosK'tochL'rexaLar'halLara'atanLI'wI'Mas To GalMat'HaMay'DujM'ChlaMoghMoQMortum HestaNa Ra'denNegh'VarNemosinNing'taoNorghNovNuQ'DujOnirosPachPeghqu'PIHPlen ZhaPumwI'Puyjaqqa'HoSQangQaw'DunQeh'RalQexaQeylIS BetleHQibQinQojQorghQuDQughRiskadhSechSivistaSomrawSuQ'jaghSuQobSuvwI'QehT'h'larTa'SubTajtiqTalat Kh'exestaTas'estaTor'KahtTy'GokorV'al'konV'kar ZadanV's'taloVakkVo'QuvVoDleHVoodiehVor'chaVor'KangXechasZ'galZ'gavastaZ'gavvaZ'mortamaZha Mortas Emblem of the Klingon Empire.
Translated names AccuserAdministratorAllianceBattle CruiserBird of PreyBringer of AgonyBringer of DestinyBringer of DestructionBringer of JusticeCarrier of DoomCatapultChancellorDeath BootDeath RiteDeath StalkerDefenderEmperorEnforcerEver VictoriousFat ManFierce RevengeGreat BirdGrim Reaper • (Gull) • HealerInsurrectionLittle KillerLucklessMenderMover • (Murph) • One WingPainbringerPathmakerPredator • (Raptor) • RavenousRelentlessRevengeSaberSeekerShadowSpeedstarStalkerStarStingerStingtongueStrong VictorStronger BirdSuspiciousSwiftwindSword of KahlessThrone SeekerTrader's GameTruthbringerTugboatUnseen CreeperWarrior's AngerWatcherWinner
Alphanumeric names B5D2D3D4D4xD5D6D7 • (D7/D5 KlolodeD7 AkifD7AD7CD7GD7MD7RD7SD7 Koloth) • D9D10 (bird of prey)D10 (cruiser)D11D12 (bird of prey)D12 (cruiser)D14D16D18D20D32E4E6F5F5BF5CF5GF5GBF5KF5LF5WF5YF6FWCFWKFWLG2G3G4G5G6G8K3K4K5K6K14K15K17K18K22 • (K22B) • K23K24K26K27K30K32L6L9L13L24L42S4S5S8T3T5T12W2
By time period or type Birds-of-prey (22nd century bird of prey2260s bird of prey) • 23rd century scout vesselmobile battle basebattleshipcargo shipcolony shipconstruction shipdropshipmining freighterprison bargerepair shipscout ship

External links[]


  1. TLE novel: The Art of the Impossible
  2. STO - Empire mission: "The Hunt is On"
  3. TLE novel: The Art of the Impossible
  4. STO - Empire mission: "The Hunt is On"
  5. TLE novel: The Art of the Impossible
  6. TLE novel: The Art of the Impossible
  7. STO - Empire mission: "The Hunt is On"
  8. STO - Empire mission: "The Hunt is On"