STARSHIP
IKV Unbreakable
Class:	E4-class escort (E4K-subclass)
Affiliation:	Klingon Empire, Klingon Defense Force
Launched:	23rd century
Status:	active (2280s)

The IKV Unbreakable was a 23rd century Klingon Empire bird-of-prey starship, a E4-class escort in Klingon Defense Force service in the 2280s. In particular, Unbreakable was built to the specifications of an E4K-subclass vessel. (TOS video game: Starfleet Command)

No history or fate is established for this vessel as its name was randomly selected for an escort vessel by the game software.

Klingon bird-of-prey vessels
E4-class	(Adamant) • (Adept) • (Conqueror) • (Darkness) • (Defender) • (Defiant) • (Determined) • (Devoted) • (Focus) • (Guardian) • (Hidden) • (Insolent) • (Invisible) • (Keeper) • (Obdurate) • (Procession) • (Raid) • (Return) • (Safeguard) • (Seeker) • (Shadow) • (Shieldbearer) • (Strike) • (Stubborn) • (Swatter) • (Trustworthy) • (Unbreakable) • (Viking)
E6-class	(Battle) • (War) • (Conflict) • (Attack)	Z'gavva-class (D32)	Falchion	D12-class	Cha'Joh
G2-class	G2C-295 • G2C-871 • G2C-913 • G2-2983 • G2-5213 • G2-9178 • (Catcher) • (Fencer) • (Fetcher) • (Fighter) • (Hunter) • (Stalker) • (Watcher)
B'rel-class (K22B)	BaHwil' • Begh'poQ • BImoqu' • BInep • BI'ngo' • BIQ'a'ngo' • Bllugh • Bowie'e • B'rel/Qel'Poh (aka Bounty) • Buruk • Chong'pogh • Ch'Tang • Dakh'yi'DIL • Dakronh ~ Kla'DIyuS • Deb'choS • Doh' • Do'Ha' • Dom'SIS • DughDuy • Dughjup • Dughla' • DughQu' • Dughro' • DughwoQ • DughyaS • Dun'wo' • Duy'Hub • Em'ree • Etam • (Fury) • Ghar'Qotlh • Gho'be' • Ghoch'ragh • GhoH'Sot • GhungDol • Ghunglom • GhungQa' • GhungQogh • Gon'dev • Grerr • guhMoh • Hegh'QeDp • Hegh'ta • Hembu' • HemDuy • Hemghol • Hemlom • Hijol'peng • Hob'DIS • Hovpeng • Huj'a'SIp • Hurgh'ragh • HuS'ngeb • Jib'lalDan • Jiyajbe' • Jol ylchu' • Jor • JuS'mung • Kad'nra • Kahless Ro • Khich • Korinar • Koroth • Krogshat • Kruge • K'ti'suka • LoS'maH • Luq'argh • MajQa'be' • Malpara • Mav'jop • Maw'HeSwI' • M'Char • Mich'pagh • Mok'tal • NaSbutlh • NaSDol • NaSDup • NaSgho • NaSghong • NaS'puchpa' • NaStaj • Nay'par • Ning'tao ~ Ning'tau • N'Kghar • Nukmay • Okrona ~ Chontay • Orantho • PiqaD'nem • Plath • Qap'ghargh • Qo' • Qovin • Qugh'tung • QuHvaj'Qob • Qul'bIQ • Quoc'Truong • Qup'SoH • Qut'Such • RanKuf • RaQpo'juS • Rotarran • Sap'leng • SID'ghom • Slivin • TaD'moH • TajHu' • Tar'be' • Tazhat • TIH'Hich • TIQ'IwSev • TlhIH'Hu • Trayor • Tu'a'rop • VIghajbe' • Vorka • Vorn • Vut'bol • Wo'bortas • Wuv'a'tem • Yaj'a' • YijatlhQo' • Ylje' • Y'tem
K'vort-class	Aktuh • Azetbur • Begh'poQ • B'iJik • Buruk • Chang • Chong'pogh • Deb'choS • Divok • Duy'Hub • Fek'lhr • Gho'be' • GhoH'Sot • Gi'ral • Gorkon • Gro'kan • Hegh'ta • Hob'DIS • Hurgh'ragh • J'Ddan • Kahless • Kang • K'Ehleyr • Ki'tang • Klag • K'mpec • K'nera • Koloth • Konmel • Koord • Kor • Koraga • Kormag • Korris • K'Ratak • Kreltek • Kruge • K'Temoc • Kurn • K'vort • L'Kor • Lorgh • Lukara • Luq'argh • MajQa'be' • Maltz • Melota • Morath • NaS'puchpa' • Nay'par • Nu'Daq • Pagh • PiqaD'nem • Qugh'tung • Qup'SoH • Qut'Such • TaD'moH • Tagak • Taj • TajHu • Tar'be • Vorn • Wuv'a'tem
Various bird-of-prey series	Boqrat • Botka • B'Rel • ChemvaH • G'gtah • Kor • K'raiykh • LIngta' • MIl'oD • ("Naprem") • Ning'tao • Norgh • Qa'Hom • Qaj • Quundar • Storm Lord • Sung puq Lod • Suy' • Teghbat • To'baj • Toppa' • VIghro' • unnamed Klingon birds-of-prey
(translated names in parentheses)