Mark III (space suit) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-27

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Mark_III_(space_suit)


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SUMMARY
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The Mark III or MK III (H-1) is a NASA space suit technology demonstrator built by ILC Dover.  While heavier than other suits (at 59 kilograms (130 lb), with a 15 kilograms (33 lb) Primary Life Support System backpack), the Mark III is more mobile, and is designed for a relatively high operating pressure.The Mark III is a rear-entry suit, unlike the EMU currently in use, which is a waist-entry suit. The suit incorporates a mix of hard and soft suit components, including hard upper torso, hard lower torso and hip elements made of graphite/epoxy composite, bearings at the shoulder, upper arm, hip, waist, and ankle, and soft fabric joints at the elbow, knee, and ankle.
The 8.3 pounds per square inch (57 kPa) operating pressure of the Mark III makes it a "zero-prebreathe" suit, meaning that astronauts would be able to transition directly from a one atmosphere, mixed-gas space station environment, such as that on the International Space Station, to the suit, without risk of the bends, which can occur with rapid depressurization from an atmosphere containing nitrogen or another inert gas.  Currently, astronauts must spend several hours in a reduced pressure, pure oxygen environment before EVA to avoid these risks.