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by lupusreal
437 days ago
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Slight correction, NASA's EMUs don't use life support umbilicals, but astronauts are meant to always be tethered (safety strap, not life support) while using them. They have SAFER thruster packs as a backup should anybody ever become untethered, but the utility of these is dubious. NASA has done deliberate totally untethered EVAs before, but AFAIK not since the 1980s, as the MMU (SAFER's larger predecessor) was retired after Challenger. The SpaceX suits used so far do have life support umbilicals. |
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