Orion Crew Survival System
Full-pressure emergency suits worn by Artemis II crew; tested on Day 5.
Last refreshed: 4 April 2026 · Appears in 1 active topic
What does the Orion crew survival suit actually protect against in deep space?
Latest on Orion Crew Survival System
- What is the Orion Crew Survival System?
- The Orion Crew Survival System (OCSS) is a full-pressure emergency suit worn by Artemis crew members during launch, re-entry, and critical phases, protecting against cabin depressurisation, fire, and splashdown immersion.Source: /t/artemis-ii-2026/3/crew-tests-emergency-suits-on-day-5
- Why did the Artemis II crew test their suits on Day 5?
- Day 5 included a planned in-flight checkout of the OCSS suits, validating both the equipment and the crew's ability to don and operate them in the Orion capsule interior during deep-space operations.Source: /t/artemis-ii-2026/3/crew-tests-emergency-suits-on-day-5
- Who makes the Artemis spacesuits?
- The OCSS is manufactured by ILC Dover. The separate lunar surface suit for Artemis III EVAs is being built by Axiom Space under a NASA contract.Source: /t/artemis-ii-2026/3/crew-tests-emergency-suits-on-day-5
- Is the Artemis suit different from the lunar surface suit?
- Yes. The OCSS is a cabin emergency suit for Orion operations. The lunar surface EVA suit for Artemis III is a separate Axiom Space design, built for extravehicular activity on the Moon.Source: /t/artemis-ii-2026/3/crew-tests-emergency-suits-on-day-5
Background
The Orion Crew Survival System (OCSS) is the full-pressure emergency suit worn by each Artemis II crew member during launch, re-entry, and critical mission phases. Unlike the International Space Station's Sokol suit or earlier shuttle launch-and-entry suits, the OCSS is designed for deep-space operations and provides protection against cabin depressurisation, fire, and water immersion following splashdown.
On Day 5 of Artemis II, the crew conducted a planned in-flight test of the OCSS, donning the suits and running through emergency protocols in the Orion capsule. This test validates not only the suits themselves but the crew's ability to operate them efficiently under the constraints of the capsule interior while already in deep space. The Day 5 timing also follows the cabin pressure false alarm on Day 2, making the suit checkout more operationally significant than a routine drill.
The OCSS was developed by ILC Dover, the same manufacturer responsible for Apollo-era spacesuits, and represents a significant upgrade in crew survivability over shuttle-era hardware. Its performance on Artemis II will inform suit requirements for Artemis III and the eventual lunar surface missions, where a different Axiom Space-built extravehicular activity suit takes over.