Editing Installation 02

{{Status|Canon}}
{{Megastructure infobox
|image=[[File:surface06.jpg|300px]]
|description=Oceans with outcroppings of rock for terrain<ref name="enc">''[[Halo Encyclopedia (2009 edition)]]'', p. 174</ref>
|location=[[Taphro]] orbit, [[Zhagolin system]]{{Ref/Book|Id=enc22p347|Enc22|Page=347}}, [[Norma Arm]],<ref name="warfleet">''[[Halo: Warfleet]]'', ''p. 13''</ref> [[Milky Way]]{{Ref/Reuse|enc}}
|anchor= Lagrange point between [[Taphro]] and [[Ind]]{{Ref/Reuse|enc22p347}}
|type=[[Halo Array|Halo installation]]{{Ref/Reuse|enc}}
|function=*Galactic sterilization<ref name="halo array">[https://www.halowaypoint.com/en-us/universe/tech/halo-array '''Halo Waypoint''': ''Halo Array'']</ref>
*[[Flood]] containment and research{{Ref/Reuse|halo array}}
|caretaker= [[007 Contrite Witness]]<ref name="HOSFM98">'''[[Halo: Official Spartan Field Manual]]''', ''page 98''</ref>
|constructed=c. [[97,445 BCE]]{{Ref/Reuse|halo array}}
|destroyed=Deactivated from [[Installation 00]]<ref name="hitd262">'''[[Halo: Hunters in the Dark]]''', ''pages 262-264'' (Google Play edition)</ref>
|destroyed-title=Status
|diameter={{Convert|10000|km|mi|sp=us}}{{Ref/Reuse|enc}}{{Ref/Reuse|halo array}}
|surface width={{Convert|318|km|mi|sp=us}}{{Ref/Reuse|enc}}{{Ref/Reuse|halo array}}
|gravity=
|surface temperature=
|atmosphere=
}}

'''Installation 02''', also known as '''Epsilon Halo''',<ref name="source">[[:File:H3 halo inner ring title.PNG|Halo 3 Texture files: ''halo_inner_ring'']]</ref> is one of the [[seven]] ring-shaped superweapons that comprise the [[Forerunner]]s' [[Halo Array]]. Located in the [[Norma Arm]] on the near-opposite side of the [[Milky Way]] galaxy from [[Installation 04]],{{Ref/Reuse|warfleet}} Installation 02 features a water-based environment with rocky outcroppings and large ice floes.{{Ref/Reuse|enc}}

==History==
===Construction and early history===
The [[Forerunner]]s had Installation 02 constructed by the [[Foundry]] of [[Installation 00]]<ref name="p371">'''[[Halo: Primordium]]''', ''page 371''</ref> approximately around the same time as the rest of the [[Halo Array]], circa [[97,445 BCE]] during the [[Forerunner-Flood war]].{{Ref/Reuse|halo array}}<ref>[https://www.halowaypoint.com/en-us/news/canon-fodder-array-with-words '''Halo Waypoint''': ''Canon Fodder - Array With Words'']</ref> The array was designed by the Forerunner [[Builder]]s to combat the parasitic [[Flood]] by eradicating them and all [[Sentience|sentient]] life in the [[Milky Way]]. After the rings were built, Installation 02 and its fellow Halos were distributed from Installation 00 to positions across the galaxy through [[slipstream space]] [[Slipspace portal|portals]].{{Ref/Reuse|halo array}}<ref>'''[[Halo Legends]]''', ''[[Origins]]''</ref> 

Afterwards, the Halo Array was [[Great Purification|fired]] and eradicated all sentient life from the galaxy. The Forerunners proceeded to [[Reintroduction|reseed]] the galaxy with life from the species that were [[Conservation Measure|preserved]] on the Halo installations. Like its fellow installations, Installation 02 became home to dormant specimens of the Flood that were intended to be used to help find a cure to the parasite in the future. With the Flood defeated, the surviving Forerunners exiled themselves from the galaxy.{{Ref/Reuse|halo array}}

===Human-Covenant War===
{{Quote|Fail-safe protocol: In the event of unexpected shutdown, the entire system will move to standby status. All remaining platforms are now ready for remote activation.|[[343 Guilty Spark]], after the Halo Array is placed into standby mode<ref name="great journey">'''[[Halo 2]]''', campaign level, ''[[The Great Journey]]''</ref>}}
On [[2552#November|November 3, 2552]], during the [[Battle of Installation 05|Battle]] of [[Installation 05]], [[Chieftain of the Jiralhanae|Chieftain]] [[Tartarus]] of the [[Covenant]] activated Installation 05, though [[United Nations Space Command]] and [[Sangheili]] forces managed to terminate the firing sequence before the Halo could fire. As per fail-safe protocol in the event of an unexpected shutdown, a signal was sent to Installation 02 and the rest of the Halos from Installation 05, placing all Halos of the array on standby mode, ready for remote activation from Installation 00. A readout from Installation 05's [[Control Room|control room]] showed that Installation 02 was fully prepared to fire on demand.{{Ref/Reuse|enc}}{{Ref/Reuse|great journey}}

However, during the [[Battle of Installation 00]] on [[2552#December|December 11, 2552]], the UNSC and allied Sangheili forces fought to prevent the Covenant from firing the Halo Array from the Ark, as Installation 02 and its fellow Halos were still in standby mode and was prepared to receive the signal to fire. Eventually, [[Master Chief Petty Officer]] [[John-117]] succeeded in deactivating Installation 02, as well as the rest of the array, before it could be fired.<ref>'''[[Halo 3]]''', campaign level, ''[[The Covenant]]''</ref>

===Post-Covenant War===
In [[2555#March|March of 2555]], [[monitor]] [[000 Tragic Solitude]] of Installation 00 utilized [[Bobby Kodiak|a captured human]] to activate the Halo Array's firing sequence, triggering a countdown set for the Halos firing in five weeks from [[2555#March|March 8, 2555]].<ref>'''Halo: Hunters in the Dark''', ''pages 39-42'' (Google Play edition)</ref> After discovering the countdown on [[Installation 07]], the UNSC and [[Swords of Sanghelios]] launched a [[Operation: FAR STORM|joint operation]] to Installation 00 in which a team destroyed Tragic Solitude and ended the Halo Array's firing sequence.{{Ref/Reuse|hitd262}}

==Description==
Like its fellow ring installations of the [[Halo Array]], Installation 02 is approximately 10,000 kilometers (6,200 miles) in diameter and has a surface width of 318 kilometers (198 miles).{{Ref/Reuse|enc}}{{Ref/Reuse|halo array}} Installation 02's environment is comprised of large oceans with outcroppings of rock, as well as far-reaching ice floes. The installation was capable of wiping out all [[Sentience|sentient]] life in a 25,000 light-year range, along with its fellow Halo installations.{{Ref/Reuse|enc}}

==Trivia==
The surface of this installation, as depicted in [[Halo 3]], is similar in appearance to [[Ganymede]]'s surface.

==Gallery==
<gallery>
File:Installation02S.png|The symbol representing Installation 02.
File:Halo ring 3.png|Surface of Installation 02.
</gallery>

==List of appearances==
*''[[Halo 2]]'' {{C|Hologram only}} {{1st}}
*''[[Halo 3]]'' {{C|Hologram only}}
*''[[Halo Legends]]''
**''[[Origins]]''
*''[[Halo: Combat Evolved Anniversary]]''
**''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]''
*''[[Halo 2: Anniversary]]'' {{C|Hologram only}}
**''[[Terminal (Halo 2: Anniversary)|Terminals]]'' {{C|Hologram only}}
*''[[Halo: Hunters in the Dark]]'' {{C|Hologram only}}
*''[[Halo: Official Spartan Field Manual]]'' {{Mo}}

==Sources==
{{Ref/Sources}}

{{Forerunner|array|category=no}}

[[Category:Halo Array]]