Editing Cryo chamber

{{Status|Canon}}
[[File:FUD_Cryo.png|right|thumb|200px|A cryo-chamber aboard the {{UNSCShip|Forward Unto Dawn}}.]]
A '''cryo-chamber''', often called a '''cryotube''',<ref name="poa">'''Halo: Combat Evolved''', campaign level ''[[The Pillar of Autumn (Halo: Combat Evolved level)|The Pillar of Autumn]]''</ref><ref name="fs150">'''[[Halo: First Strike]]''', ''page 150'' (''"John brushed off the frost buildup that clouded the top half of the cryotube, and revealed the green-armored figure sprawled behind the plastasteel shell."'')</ref><ref>'''[[Spartan Ops|Halo: Infinity]]''', ''[[Invasion (Spartan Ops)|Invasion]]''</ref> is [[plastasteel]] pod with a form-fitting gel bed that allows all of a starship's non-essential personnel to be [[Cryonics|cryonically frozen]] for long periods of time, most commonly during prolonged [[Slipstream space|slipspace]] jumps.{{Ref/Reuse|fs150}} An example of this is [[John-117]], who was stored in a cryo-chamber aboard the ship {{UNSCShip|Pillar of Autumn}} and later unhatched from the cryosleep chamber by Tech Chief [[Thom Shephard]] along with Tech Officer [[Samuel N. Marcus|Sam Marcus]].

Known models of the cryo-chamber include the [[Mark VII Personal Suspension Unit]], manufactured by [[Jakubaitis Standard Systems]]. It was widely disliked by UNSC personnel because of its inferior moisture balancing; this resulted in dry, itchy skin for a day or more after awakening, known as "cryo-itch". It was later replaced by the [[Mark VIII Cryogenic Suspension Chamber]], although many older craft still use the Mark VII.<ref>'''[[Halo Encyclopedia (2009 edition)]]''', ''page 216''</ref> 

Cryo chambers are referred to as "the freezer" in slang.<ref>'''[[Halo: The Fall of Reach]]''', ''page 102''</ref> Another slang term for the chamber is "the Admiral's wife" because it is a "frosty bed". Being put in cryo is also referred to as being "put on ice."<ref>'''[[Halo: The Cole Protocol]]''', ''page 21''</ref>

==Technical specifications== 
[[File:HCEA-CryoChamberSide.png|right|thumb|200px|A standard cryo-chamber aboard a [[Halcyon-class light cruiser|''Halcyon''-class light cruiser]].]]
The cryo-chambers are usually stored in a dedicated area of the ship, commonly referred to as a "cryo bay".{{Ref/Reuse|poa}} Cryo chambers are monitored by the ship's [[Artificial intelligence|AI]], and the AI can awaken crew members at a moment's notice. Cryo-computer is designed to change the pharmaceuticals dosage if an individual appears as though they might wake from cryogenic sleep.<ref>'''[[Halo: Contact Harvest]]''', ''page 60'' (''"The cryo-computer observed a surge of activity in Avery’s brain-an effort to yank himself out of REM-and upped his dosage."'')</ref> Cryo wake-up protocols demand that crew check each other to make sure everyone revives from cryo all right. There is usually a medical pod in cryogenics bays for emergency resuscitation situations.<ref>'''Halo: The Fall of Reach''', ''page 14'' (2001 edition)</ref>

To prevent ice crystals from forming in one's cells, a person going into cryosleep must be injected with a chemical known as [[cytoprethaline]].<ref name="fud">'''[[Halo 4: Forward Unto Dawn]]'''</ref> A substance known as [[bronchial surfactant]] must also be ingested to protect the lungs. Individuals in cryo tubes are given a steady supply of pharmaceuticals that control the frequency and duration of cryosleep cycles along with influencing the content of their dreams.<ref>'''[[Halo: Contact Harvest]]''', ''page 60''</ref> While in cryo, humans do not age; as a result many UNSC military personnel, who routinely undergo long stretches of cryosleep during slipspace travel, effectively age slower than most civilians.<ref>'''[[Halo: New Blood]]''', ''page 17'' (Google Play edition)</ref>

Extended periods in cryosleep can result in a condition often called [[freezer burn]] which is a pain caused by cryo pharmaceuticals trapped in muscles and joints.<ref>'''[[Halo: Contact Harvest]]''', ''page 107''</ref> People are almost always stored in cryotubes naked, as covered skin generally reacts badly to the cryo process, leaving skin raw and blistered.<ref>'''[[Halo: The Flood]]''', ''page 20''</ref> However, it is possible for [[SPARTAN-II program|Spartans]] to go into cryo chambers fully armored, using their conditioning and training to ignore the pain.<ref>'''[[Halo: The Flood]]''', ''page 21''</ref> Cadets at [[Corbulo Academy of Military Science|Corbulo Academy]] regularly wore carbon-black skintight clothing during cryo training; the use of these "cryo suits" did not lead to the blistering frequently caused by normal clothing. As of the year [[2557]], UNSC personnel on at least some ships are given special white jumpsuits to wear when going into cryo.{{Ref/Reuse|fud}}

Entering cryo can also be used as an emergency measure. Often a person may be placed in cryo in order to save them from succumbing to grievous injuries, such as in the case of [[Linda-058]], who was placed in a cryo-chamber after being severely injured during the [[Fall of Reach]], and successfully revived later despite being previously declared clinically dead. Each chamber will hold an individual for as long as necessary, and can be ejected prior to an emergency landing, thus saving some crew from harm to be recovered later. Some pods feature [[slow-impulse thruster]]s for limited maneuvering in the event of ejection.<ref>'''[[Halo: First Strike]]''' (2010), ''Adjunct''</ref> After the aft section of the {{UNSCShip|Forward Unto Dawn}} was left drifting in space years from rescue, the [[John-117|Master Chief]] entered cryo sleep in order to survive the wait for rescue. When the {{UNSCShip|Spirit of Fire}} was left adrift in space without a slipspace drive, its crew entered cryosleep for 28 years, only to be awakened when the ship unexpectedly arrived at [[Installation 00]].
{{Clear}}

==Trivia==
*The [[slipspace field pod]] is the [[Forerunner]] equivalent to the cryo chamber; these pods use a slipspace stasis field to suspend the occupant in time and to protect them from outside harm. It is unknown whether the [[Covenant]] possesses an equivalent of the cryo chamber, as such technology is yet to be mentioned or observed.
*Even though humans must enter a cryo-tube naked or risk being blistered when they emerge, [[Ellen Anders|Professor Ellen Anders]] in ''[[Halo Wars]]'' and [[Catherine Halsey|Dr. Catherine Halsey]] in ''[[The Package (animated short)|The Package]]'' both entered their tubes fully clothed, while the crew aboard UNSC ''Spirit of Fire'' were also fully clothed when emerging from 28 years of cryosleep. These were cases of artistic license, however, since showing nudity would force up both the games' and the short film's rating.
*In ''[[Halo: Combat Evolved]]'', it is possible through a [[Headless Master Chief|glitch]] to get back inside the tube, and see the Chief, headless.

==Gallery==
<gallery>
File:HCE-CryoChamberSideLeft.png|A left-side view of a cryo-chamber on the {{UNSCShip|Pillar of Autumn}} in ''[[Halo: Combat Evolved]]''.
File:HCE-CryoChamberSide.png|A cryo-chamber in ''Halo: Combat Evolved''.
File:HCE - Screenshot - Cryo pod 01.png|John-117 in a cryo-chamber in ''Halo: Combat Evolved''.
File:HW cryobay concept.jpg|Concept art of the cryo chambers of the {{UNSCShip|Spirit of Fire}} for ''[[Halo Wars]]''.
File:HW CryoBay Concept 2.jpg|Concept art for ''Spirit of Fire''{{'}}s cryo bay.
File:Cryobay.jpg|In-game view of the cryo-chamber bay of the ''Spirit of Fire'' in ''Halo Wars''.
File:HaloWars-CryoChamber.png|A single cryo-chamber from ''Halo Wars''.
File:Papadakis.jpg|A [[Papadakis|marine]] inside a cryo-chamber.
File:HalseyPod.jpg|[[Catherine Halsey|Catherine Halsey]] in a cryo-chamber, fully clothed, in ''[[Halo Legends]]: [[The Package]]''.
File:HaloReach - John117.png|John-117 inside a cryo-chamber in an Easter egg in ''[[Halo: Reach]]''.
File:Cryo_pod_01.png|John-117 in a cryo-chamber in ''[[Halo: Combat Evolved Anniversary]]''.
File:FUD - CryoChambers.jpg|Some cryo-chambers at [[Corbulo Academy of Military Science]] in ''[[Halo 4: Forward Unto Dawn]]''.
File:H4FUD Cryo-bay.jpg|Panoramic view of the {{UNSCShip|Forward Unto Dawn}} cryo-bay in ''Halo 4: Forward Unto Dawn''.
File:H4_ForwardUntoDawn_CryoRoom_Concept.jpg|Concept art of the cryo-bay on the ''Forward Unto Dawn'' for ''[[Halo 4]]''.
File:H4-Concept-Dawn-Cryo.jpg|Concept art of the ''Forward Unto Dawn''{{'}}s cryo-bay.
File:H4 Chief in cryochamber.png|John-117 in a cryo-chamber in ''Halo 4''.
File:H4-Render-CryoTube.png|Extracted view of a cryo-chamber in ''Halo 4''.
File:H4-CryoChamber-ScanRender.png|Alternate view of a cryo-chamber in ''Halo 4''.
File:H4 Chief thaw.jpg|[[Cortana]] giving the command to thaw the Master Chief.
File:TFoR-as-Keyes-cryo.jpg|[[Jacob Keyes]] exiting a cryo chamber on-board the ''[[Han]]'' in ''[[Halo: The Fall of Reach - The Animated Series]].
File:HW2-cryo chamber.png|''Spirit of Fire'' crew exiting cryo-chambers in ''[[Halo Wars 2]]''.
File:MCC - HCEA main menu preview.jpg|The ''Pillar of Autumn'' cryo chambers in ''[[Halo: The Master Chief Collection]]''.
</gallery>

==List of appearances==
{{col-begin}}
{{col-2}}
*''[[Halo: The Fall of Reach]]'' {{1st}}
*''[[Halo: Combat Evolved]]''
*''[[Halo: The Flood]]''
*''[[Halo: First Strike]]''
*''[[Halo: Contact Harvest]]''
*''[[Halo 3]]''
*''[[Halo: The Cole Protocol]]''
*''[[Halo Wars]]''
*''[[Halo Legends]]''
**''[[Origins]]''
**''[[The Package (animated short)|The Package]]''
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
**''[[Dirt]]''
*''[[Halo: Blood Line]]''
*''[[Halo: Reach]]''
**''[[Dr. Halsey's personal journal]]''
*''[[Halo: Fall of Reach]]''
**''[[Halo: Fall of Reach - Boot Camp|Boot Camp]]''
**''[[Halo: Fall of Reach - Invasion|Invasion]]''
*''[[Halo: Combat Evolved Anniversary]]''
{{col-2}}
*''[[Halo 4: Forward Unto Dawn]]''
*''[[Halo 4]]''
**''[[Spartan Ops]]'' {{Mo}}
**''[[Infinity Briefing Packet]]'' {{Mo}}
*''[[Halo: Escalation]]''
*''[[Halo: The Fall of Reach - The Animated Series]]''
*''[[Halo Mythos]]''
*''[[Halo: Fractures]]''
**''[[The Ballad of Hamish Beamish]]''
*''[[Halo: Tales from Slipspace]]''
**''[[Something Has Happened]]''
*''[[Halo: Smoke and Shadow]]''
*''[[Halo Wars 2]]''
*''[[Halo: Envoy]]''
*''[[Halo: Renegades]]'' {{Mo}}
*''[[Halo Infinite: Memory Agent]]''
{{col-end}}

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

[[Category:Cryogenics]]