Ark

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Arks are massive Forerunner installations designed with the primary purpose of manufacturing Halo rings.

There are two classifications of Ark: Lesser Arks, which produce rings 10,000 kilometers in diameter, and Greater Arks, which produce rings 30,000 kilometers in diameter. The only Ark known by designation, Installation 00, was a Lesser Ark.

Known Arks

Installation 00
An unidentified Greater Ark (produced Installation 07)^[1]
Unknown number of various other Arks.

List of appearances

The Forerunners

Halo Array

Arks	Greater Ark • Installation 00

Senescent array	Gyre 01 • Gyre 02 • Gyre 03 • Gyre 04 • Gyre 05 • Gyre 06 • Gyre 07 • Gyre 08 • Gyre 09 • Gyre 10 • Gyre 11 • Gyre 12

Neoteric array	Installation 01 • Installation 02 • Installation 03 • Installation 04 (Alpha Shard) • Installation 05 • Installation 06 • Installation 07 • Installation 08 • Installation 09

Other	Prototype Halo installation

Installation components

Archive • Auditorium • Barrier tower • Beacon tower • Cartographer • Charging column • Clarion • Composer's Abyss • Confidence-class weapon array • Conservatory • Conspectus network • Control room (Installation 03 • Installation 04 • Installation 05 • Installation 09) • Control Tower • The Core • Curative spines • Door interlock • Elevators • Flood containment facilities • Flood research facilities • Foundry • Fort • Garrison • Gravity anchor • Index chamber • Library • Lifesupport pod • Monitor • Phase pulse generator • Power Node • Reformation Spire • Relay station • Repository • Shrine defender • Skycrypt • Skydock • Spire of Healing • Secondary reactor • Supply elevator • Terminus • Weather spire

Other installations

Shield worlds	Requiem / Shield 0001 • Sarcophagus / Shield 006 (Onyx) • Genesis / Shield 0111 (Gateway) • Trove / Shield 0459 • The Refuge / Shield 0673 • Bastion / Shield 0983 • Shield 10021 • Cloister

Maginot Line	Line installation (1-4 • 9-12 • 444-447)

Other megastructures	Clinquant • Maethrillian (Crown) • Orbital reformer (X-40 • X50) • Paradigm's Loom • Quarantine shield • Seed world

Other facilities	Arcadia ruins • Ariel complex • Coral complex • Deep-Space Anomaly#0198 • Edom Terminal\Juridical • Harvest relic • Invicta • Menachite complex • Meridian complex • Portal at Voi • Seclusion Spiral • Sharquoi hive • Site 17 • Site 22 • Temple of the Abiding Truth • Temple of the Sundered Sky • Ten Cities of Edification • Threshold gas mine

Technology

AI suppressor • Ancilla • Anti-gravity gondola • Assembler vats • Astroengineering • Baffler • Combat skin ((War sphinx • Seeker)) • Confinement bubble • Confinement field • Constraint field • Console • Coordinate key • Dazzler • Design seed ((Upgrade seed)) • Durance ((Didact's Gift)) • Encephalon • Energy core • Engineering unit • Entanglement dish • Flarecore • Gas canister • Guardian • Hard light (Light bridge) • Grappler • Huragok • Interdiction web • Lifeworker beacon • Mind transfer • Modular Dispersal Technology • Observation pane • Personal armor • Power core • Relic core • Sharquoi • Slipspace bubble • Slipspace core (Flake) • Slipspace field pod • Slipspace translocation ((Personal slipspace unit • Teleporter • Teleportation grid • Slipspace portal)) • Smartmatter • State-shifter • Stasis field • Verivorr • Weapon rack • Z-9930 Terminal

Ships

Civilian starships	Council ship (Seedling Star) • Builder ship • Mining ship • Audacity • Eden • Falco-class space pod • Gargantua-class transport • Keyship (Supernal Spiral-class • Anodyne Spirit) • Lifeworker terraforming vessel

Small craft and weapon-ships	Aethra • Despair-class fighter • Phaeton • Seeker • Tempo (Merganser-class) • War sphinx

Escorts	Escort (Twelfth-order escort • Dignity-class • Preservation-class) • Harrier (Acolyte-class • Strix-class)

Warships	Auxiliary • Dragoon (Sojourner-class • Skirr-class) • Picket cruiser • Fortress-class vessel (Deep Reverence • Long Reverence) • Cruiser • Interdictor • Raptor (Second-order fast frigate)

Battle stations	Aspis platform • Castellan • Mantle's Approach

Unknown type	Babd Catha vessel • Fast attack runner • Planet-breaker (Didact's ship) • Vigilant

Sentinels

Types

Aggressors	Eliminator • Aggressor Sentinel

Protectors	Ark variant • Trove variant

Strato-Sentinels	Assembler • Excavator • Extractor • Retriever • Steward

Miscellaneous	Onyx • Enforcer • Constructor • Controller • Regulator • Safeguard • Super • Promethean Watcher • Unidentified • Gatherer • Guardian • Monitor • Sub-monitor • Eradicator Sentinel

Armigers

Soldiers	Armsman • Bandit • Hydra

Snipers	Specialist

Officers	Enforcer • Guard • Operative

Related facilities

First-aid monitor • Protector plant • Sentinel manufacturing facility (Ferrarius Assembler Vats) • Sentinel launcher • Sentinel factory • Sentinel wall

Weaponry

Infantry weapons	Z-110 Boltshot (Closed Fist • Open Hand) • Z-130 Suppressor (Song of Peace • Razor's Edge) • Z-180 Scattershot (Loathsome Thing • Didact's Signet) • Z-250 lightrifle (Barbed Lance • Dying Star) • Z-390 incineration cannon (River of Light • Heartseeker) • Z-750 binary rifle (Retina of the Mind's Eye • Twin Jewels of Maethrillian) • Unidentified weapon • Lightblade • Cindershot (Backdraft) • Hard light stave • Heatwave (Scatterbound) • Gravity wrench • Misericordia • Riftblade

Grenades	Z-040 pulse grenade • Z-400 splinter grenade

Mounted weapons	Forerunner turret • Z-510 focus turret • Z-520 splinter turret • Destructor beam • Enforcer missile launcher • Shard cannon • Sterilization beam (Focus beam • Sentinel beam (Arcane)) • Sentinel pulse

Battlefield equipment	Z-90 hardlight shield • Z-2500 autosentry • Z-4190 bubble shield (adapted) • Z-5080 Promethean vision • Autoturret

Ship-mounted and heavy weaponry	Anti-ship artillery system • Attenuation pulse emitter • Confidence-class weapon array • Converging beam cannon • Disruption generator • Glimmerlance • Heavy ion weapon system • Light mass fusillade cannon • Particle cannon (Z-8060 particle cannon) • Stasis tension driver • Torsion driver • Z-8250 (Heavy artillery • Light artillery) • Weapon-core

Artifacts

Activation Index • Composer • Conduit • Cryptum • Deadbolt • Reach crystal • Deep-space artifact • Didact's Gift • Janus Key • Luminal Beacon • Luminary • Pori Meteor • Requiem communication artifact • Requiem slipspace artifacts • Sigma Octanus IV artifact • Sefom Invictus • Spine of the Gods • Terminals • Unidentified machine • Vertex • Wings of Malygus

^ Halo: Primorduim page 343

Known Arks

List of appearances

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