Cryonics (Earth-5875)

Cryonics refers to the human science that preserve organisms in stasis for long periods of time. Cronics aim to allow individuals to "sleep" through extended time intervals without biologically aging and, upon awakening, to return without any ill effects. The UNSC and human civilian or non-military ships utilizes cryo chambers in their ships, where human suspension reduce the metabolism of the body to near zero, and thus eliminating any need for oxygen. Most ship personnel are suspended for 120 hours during a slipspace travel, and as a result most ships are operated by skeleton crews, executive synthetic officers, or a shipboard artificial intelligence.