Editing Installation 03

{{Status|Canon}}
{{Megastructure infobox
|image=[[File:H4-Composer-GammaHalo-Ring.jpg|300px]]
|description=Deserts, jungles, and volcanic terrain{{Ref/Reuse|Id=Enc174}}
|location=[[Khaphrae system]],{{Ref/Book|Id=Enc174|Enc09|Page=174}}{{Ref/Book|Id=H4EVG|H4EVG}} [[Scutum-Centaurus Arm]],{{Ref/Book|Id=WF13|HWF|Page=13}} [[Milky Way]] {{C|formerly}}
|anchor=[[Doavyn]]{{Ref/Book|Id=Enc22P348|Enc22|Page=348}} {{C|formerly}}
|type=[[Halo Array|Halo installation]]
|function=*Galactic sterilization{{Ref/Site|Id=halo array|URL=https://www.halowaypoint.com/en-us/universe/tech/halo-array|Site=Halo Waypoint|Page=Halo Array|D=9|M=4|Y=2015|LocalArchive=Archive:Halo_Waypoint/2014_to_2020/Universe/Tech#Halo_Array}}
*[[Flood]] containment and research{{Ref/Reuse|halo array}}
|caretaker=[[Monitor]] [[049 Abject Testament]]{{Ref/Game|Id=Terminal|HCEA|Terminal (Halo: Combat Evolved Anniversary)|Terminal|Detail=2}}
|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>
*Previously secured by [[United Nations Space Command|UNSC]]
*Unknown. Last seen in the possession of monitor [[859 Static Carillon]]
|destroyed-title=Status
|diameter={{Convert|10000|km|mi|sp=us}}{{Ref/Site|Id=universe|URL=https://www.halowaypoint.com/en-us/universe/locations/gamma-halo|Site=Halo Waypoint|Page=Gamma Halo|D=27|M=10|Y=2015|LocalArchive=Archive:Halo Waypoint/2014 to 2020/Universe/Locations#Gamma Halo}}
|surface width={{Convert|318|km|mi|sp=us}}{{Ref/Reuse|halo array}}
|gravity=1.1 G{{Ref/Reuse|universe}}
|surface temperature=-21°C to 43°C (-6°F to 109°F){{Ref/Reuse|universe}}
|atmosphere=1.02 ([[Wikipedia:Nitrogen|N<sub>2</sub>]], [[Oxygen|O<sub>2</sub>]], [[Argon|Ar]]){{Ref/Reuse|universe}}
}}

'''Installation 03''', also known as '''Gamma Halo''',{{Ref/Level|H4|Composer (level)|Composer|Detail=[[H4:Audio log|Audio log]]}}{{Ref/Generic|Id=11h|Heading=[[Eleventh Hour reports]]|Detail=5}} is one of the [[seven]] ring-shaped superweapons that comprise the [[Forerunner]]s' [[Halo Array]]. Located in orbit of [[Doavyn]] in the [[Khaphrae system]] in the [[Scutum-Centaurus Arm]] of the [[Milky Way]] galaxy,{{Ref/Reuse|WF13}}{{Ref/Reuse|Enc22P348}} Installation 03's [[monitor]] is [[049 Abject Testament]].{{Ref/Reuse|Terminal}} The ring appears to have a red and cracked surface, indicating the presence of vast deserts and volcanic activity, but it also features jungles.{{Ref/Reuse|Enc174}}

Although Installation 03 was originally anchored in orbit around a gas giant for the firing of the Array, by the time of its discovery by humanity in the twenty-sixth century, it orbited a rocky planet, the face of which had been shattered as a result of a fairly recent impact event; the debris from the impact, still aglow as of [[2557]], has collected to form a dense [[asteroid]] field in orbit over the planet as well as the Halo.{{Ref/Level|Id=Composer|H4|Composer (level)|Composer}}

==Overview==
===Ecology===
As of [[2557#July|July 26, 2557]], [[Frederic-104]] told [[Linda-058]] that the [[Ivanoff Station]] files made no mention of wildlife on Installation 03.{{Ref/Comic|Id=HEI9|HE|Issue=9}}

==History==
===Construction and early history===
The [[Forerunner]]s had Installation 03 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/Site|Id=CFArray|URL=https://www.halowaypoint.com/en-us/news/canon-fodder-array-with-words|Site=Halo Waypoint|Page=Canon Fodder - Array With Words|D=23|M=12|Y=2019}} 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 03 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/Film|Film=Halo Legends|Story=Origins}} with Installation 03 itself being placed in orbit over [[Doavyn]].{{Ref/Reuse|Enc22P348}} 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 03 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}}

Several centuries before its discovery by [[humanity]], Doavyn experienced a mysterious cataclysmic event of unknown origin. This event resulted in the shattering of the planet, with large chunks of it exploding into space and becoming caught in orbit in the form of an asteroid field. During the cataclysm, Installation 03 suffered extraordinary damage and its [[monitor]], [[049 Abject Testament]], went missing around the same time. Since the event, however, the Halo underwent significant repairs and had been returned to a habitable state.{{Ref/Reuse|Enc22P348}}

===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/Level|Id=GJ|H2|The Great Journey}}}}
During the [[Battle of Tribute]] in [[2552#August|August 2552]], the freighter ''[[Floral Express]]'' fled the planet while carrying colonial refugees. Following a random [[slipspace]] trajectory per the [[Cole Protocol]], the ship arrived near Installation 03 on [[2552#October|October 8]]. Upon returning to Earth, the crew was detained by the [[Office of Naval Intelligence]] for possible violations of the Cole Protocol. After examining ''Express''{{'}}s flight records, based on intelligence gleaned from the [[Battle of Installation 04]], ONI contacted and redirected pioneer teams to the Khaphrae system.{{Ref/Reuse|11h}} Soon after confirming it was Installation 03, the teams attempted to find and secure the installation's [[Library]] to recover the [[activation index]] as part of neutralization protocols established by [[2552#October|October 25]]. Since Earth was [[Battle of Earth|under attack]] at the time, the teams could not return home, and they did not have the force of arms to remain on the ring, the teams settled in for a long habitation in a makeshift orbital base which they named [[Ivanoff Station]].{{Ref/Book|Id=HM164|HM|Page=164}}

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 03 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 03 was fully prepared to fire on demand.{{Ref/Reuse|Enc174}}{{Ref/Reuse|GJ}}

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 03 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 03, as well as the rest of the array, before it could be fired.{{Ref/Level|H3|The Covenant (level)|The Covenant}}

===Post-Covenant War===
Shortly after the end of the war Ivanoff was expanded into a permanent UNSC facility.{{Ref/Reuse|HM164}} In [[2553|March 2553]], Dr. [[Catherine Halsey]] was indefinitely detained there by [[Admiral]] [[Margaret Parangosky]], CINCONI, as retribution for lying to the admiral about the creation and deployment of [[flash clone]]s during the SPARTAN-II program's early phases.<ref>'''Halo: Glasslands''', ''page 341''</ref> [[Spartan Operations|Spartan]] teams were deployed to reconnoiter the surface, to quarantine areas of potential [[Flood]] contamination, and to recovery any notable Forerunner artifacts.{{Ref/Reuse|H4EVG}} The [[PIONEER-class Mjolnir]] variant first saw field use during these exploratory deployments.{{Ref/Game|H4|[[PIONEER-class Mjolnir]] description|Quote=Used by security escort during the first exploration efforts on Installation 03.}} 

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}}

===The Composer===
{{Quote|Even now, your kind tinkers with the Composer in the shadow of the third ring. Children and fire, who disregard the welfare of the galaxy.|The Ur-Didact about the human activities in and around Gamma Halo.{{Ref/Level|H4|Shutdown}}}}
[[File:HM-Composer extraction final.jpg|thumb|left|250px|The Composer being extracted from the surface of Installation 03 by the {{UNSCShip|Infinity}}.]]
The ONI science teams retrieved various artifacts from the surface of Installation 03 and brought them on Ivanoff Station for study, including the installation's [[activation index]], a [[war sphinx]]'s "eye",{{Ref/Site|Id=CFHaveSmoa|URL=https://www.halowaypoint.com/en-us/news/canon-fodder-have-s-moa|Site=Halo Waypoint|Page=Canon Fodder - Have S'moa|D=28|M=03|Y=2019}} and a [[Composer]]. An accident with the Composer killed the team researching the device; however, it provided coordinates which led the {{UNSCShip|Infinity}} to the [[shield world]] known as [[Requiem]]. When the [[Ur-Didact]] was awakened, he traveled to Ivanoff in his ship ''[[Mantle's Approach]]'' and [[Raid on Ivanoff Station|acquired the Composer]] on [[2557#July|July 24, 2557]], using it to digitize Ivanoff's staff before jumping into slipspace to travel to [[Earth]] to use the recovered weapon on humanity's homeworld.{{Ref/Reuse|Composer}} However, SPARTAN-117 and Cortana followed the Didact into slipspace in an [[F-41 Broadsword]] in hopes of foiling his plan, ultimately defeating him.{{Ref/Level|H4|Midnight}}

By the time of the Didact's attack, [[SPARTAN-II]] [[Black Team]] had been assigned to Gamma Halo,{{Ref/Site|URL=https://www.halowaypoint.com/en-us/news/canon-fodder-local-units|Site=Halo Waypoint Forums|Page=Catalog Interaction|D=12|M=10|Y=2014}} along with a research attaché. The science team established a camp in one of the Halo's deserts. On July 25, Team Black and the scientists were killed by the Didact and his Promethean machines, who had been flung to the Halo through a slipspace portal aboard ''Mantle's Approach'' during the [[New Phoenix Incident]]. Around the same time, [[859 Static Carillon]], the monitor of the [[Composer's Forge]], attempted to contact Gamma Halo's monitor after a service portal between the Halo and the Composer's Forge was reopened. Receiving no response, Static Carillon traveled through the portal to the [[Composer's Abyss]] on Installation 03, where he encountered the Didact. At the Promethean's request, the monitor led him to the portal to the Composer's Forge, on the condition that the Didact would not use the Composers to create more [[Promethean Knight]]s, as Static Carillon considered the constructs "abominations".{{Ref/Reuse|HE9}}
{{clear}}
====Actions in the jungle====
[[File:HE Installation 03.jpg|thumb|100px|A section of Installation 03 is ejected toward the [[Composer's Forge]].]]
{{Main|Battle of Installation 03}}
During these events, [[Jul 'Mdama's Covenant|Covenant forces]] landed in a jungled region of Gamma Halo where they took the artifact known as the [[Conduit]] to a Forerunner structure they termed the [[Altar]] in order to open [[slipspace portal]]s all over Gamma Halo and take control of the ring. One of these portals was opened by way of a mysterious [[unidentified Forerunner machine|machine]] located in the jungle. A large number of UNSC forces, including [[Marine]]s and a [[Spartan]] [[Headhunter]], were sent to the Altar to reacquire the Conduit in tandem with [[unidentified Spartan-IV|a lone Spartan-IV]] who was deployed to the jungle to investigate the machine.{{Ref/Level|HSS|Operation B: Steadfast Pursuit}}{{Ref/Level|Id=OPC|HSS|Operation C: Valiant Hammer}}{{Ref/Level|Id=OPD|HSS|Operation D: Adamantine Shield}}{{Ref/Level|Id=OPE|HSS|Operation D: Brother's Keeper}} After securing the Conduit, the Spartan Headhunter was redeployed to Earth in hopes of using the Conduit to deter the subsequent [[Promethean]] [[Skirmish in New Phoenix|invasion]] of [[New Phoenix]] with help from ONI scientists and eventually the other Spartan.<ref name="OPC" /><ref name="OPD" /><ref name="OPE" />

====Relocation====
{{Main|Mission to Installation 03}}
On July 25, 2557, [[Blue Team]] arrived on Installation 03 to investigate the loss of contact with Black Team on [[Terrence Hood|Admiral Terrence Hood]]'s orders. Upon discovering the fate of Black Team and the scientists, and destroying some of the Knights responsible for the massacre, they soon came across the Composer's Abyss and the slipspace portal within.{{Ref/Comic|Id=HE8|HE|Issue=8}} Entering the service portal, Blue Team arrived at the Composer's Forge, where they encountered the Didact, who summoned an army of newly-created Promethean machines to attack them. At the Didact's request, 859 Static Carillon transported Installation 03 through slipspace to orbit over the planet housing the Composer's Forge. However, Static Carillon also turned on the Didact and allied with Blue Team, as he felt betrayed by the Didact because he had broken his promise to the monitor not to produce more Prometheans. The Didact used the portal to return to Gamma Halo, taking one of the Composers with him. Blue Team followed in close pursuit and were confronted by the Didact again at the top of the Composer's Abyss.{{Ref/Reuse|HE9}} Though the Spartans were nearly killed by the Didact, Static Carillon arrived to the site just in time to save them, incapacitating the Didact and sending him into [[Control Room (Installation 03)|Gamma Halo's control room]] by utilizing the local [[teleportation grid]].{{Ref/Comic|Id=HE10|HE|Issue=10}}

Wielding Gamma Halo's [[Activation Index]] which the Didact had dropped when the monitor ambushed him, John-117 followed the Didact into the control room with Static Carillon's help while the other Spartans returned to their Longsword. The Master Chief used the Index to give 859 Static Carillon control of Gamma Halo, enabling the monitor to detach the segment of the ring housing the control center. This caused massive cracks to appear in the landscape surrounding the removed plate. Static Carillon was momentarily preoccupied with stabilizing the Halo as the plate's sudden removal would have otherwise resulted in the ring's destruction. Although the plates on both sides of the removed portion were not immediately connected, thus closing the loop of the ring, Gamma Halo was able to maintain structural integrity. After teleporting John-117 to safety just as the removed fragment impacted the Composer's Forge and destroyed it, Static Carillon took Installation 03 for safekeeping and repairs in an undisclosed location.{{Ref/Reuse|HE10}}

By [[2558|October, 2558]], Gamma Halo's new location was still unknown by the UNSC, with its Activation index being kept by ONI in a undisclosed location.{{Ref/Book|OSFM|Page=98}}

==Production notes==
In [[:File:H3 halo inner ring title.PNG|''Halo 3''{{'}}s texture files]], Installation 03 is named "Eta Halo", while the designation "Gamma Halo" is given to [[Installation 06]]. This has since been ignored by all ''Halo'' releases, which designate Installation 03 as Gamma Halo and [[Installation 06]] as Eta Halo.

==Gallery==
<gallery>
File:Installation03S.png|The [[Forerunner symbols|symbol]] representing Installation 03.
File:Installation03.jpg|Hologram of Installation 03 seen on Installation 00 in ''[[Halo 3]]''.
File:Gamma Halo.png|Another view of the hologram of Installation 03 seen on Installation 00 in ''[[Halo 3]]''.
File:H4-GammaHalo-Installation03.jpg|[[John-117]] gazing upon Installation 03 in ''[[Halo 4]]''.
File:H4-GammaHaloInst03-ScanScreen.jpg|Another view of Installation 03.
File:KhaphraeSystem-planet.jpg|Doavyn, the planet around which Gamma Halo formerly orbited.
File:Escalation - GammaHalo Longsword.png|Blue Team's Longsword over the Halo.
File:Escalation - Desert.png|A desert on Installation 03.
File:HE - Installation 03 - horizon.png|A look at the ring.
File:Escalation - GammaCamp.png|A human science camp in a desert on the Halo's surface.
File:Escalation - BlackTeam&Didact.png|Black Team discovering the unconscious [[Ur-Didact]] on the installation.
File:Escalation - AbyssEntrance.png|The entrance to the [[Composer's Abyss]].
File:HE Installation 03 damaged.jpg|[[859 Static Carillon]] detaches a segment of the Halo, damaging the surface of the ring.
File:HSS-MustacheMan.png|A hologram of Installation 03 in ''[[Halo: Spartan Strike]]''.
File:HSS-Gamma Halo Pelican.png|A Pelican near Gamma Halo.
File:HSS-Infinity-Halo.png|The UNSC ''Infinity'' arrives at Gamma Halo.
File:HSS-Gameplay-Don't Look Down.jpg|A Spartan fighting Prometheans in Gamma Halo's jungles.
File:HSS-Gameplay-Pylons.jpg|A Forerunner structure in the Altar's vicinity.
File:Installation 03 Map 1.png|A map of a location on Gamma Halo in ''Halo: Spartan Strike''.
File:Installation 03 Map 2.png|A map of the [[Altar]]'s immediate region in ''Halo: Spartan Strike''.
</gallery>

==List of appearances==
*''[[Halo 2]]'' {{C|Holographic representation only}} {{1st}}
*''[[Halo 3]]'' {{C|Holographic representation only}}
*''[[Halo Legends]]''
**''[[Origins]]''
*''[[Halo: Glasslands]]''
*''[[Halo: Combat Evolved Anniversary]]''
**''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]''
*''[[Halo 4]]''
*''[[Halo: Escalation]]''
*''[[Halo 2: Anniversary]]'' {{C|Holographic representation only}}
*''[[Hunt the Truth]]''
**''[[Hunt the Signal]]''
*''[[Halo: Spartan Strike]]''
*''[[Halo: Hunters in the Dark]]'' {{Mo}}
*''[[Halo 5: Guardians]]''
**''[[Halo 5: Guardians Limited Edition dossiers|Limited Edition dossiers]]'' {{Mo}}
*''[[Halo Mythos]]''
*''[[Halo: Official Spartan Field Manual]]'' {{Mo}}
*''[[Halo: Epitaph]]'' {{Mo}}
*''[[Halo: The Machine Breaks]]'' {{Mo}}

==Sources==
{{Ref/Sources|2}}

{{Forerunner|array|category=no}}

[[Category:Halo Array]]
[[Category:Installation 03 locations| ]]