NASA’s Simulation Broadcast Confusion

On Wednesday, NASA mistakenly broadcasted a simulation of astronauts receiving treatment for decompression sickness on the International Space Station (ISS). This led to widespread speculation about a real emergency on social media.

Broadcast Incident

At about 5:28 p.m. U.S. Central Time (2228 GMT), NASA’s live YouTube channel aired audio suggesting that a crew member was experiencing decompression sickness (DCS). A female voice in the recording was heard instructing crew members to “get commander back in his suit,” check his pulse, and provide oxygen, describing the situation as “tenuous.” However, NASA has not confirmed the authenticity of the audio circulating on social media.

Response from NASA

Many space enthusiasts shared the audio online, warning of a serious emergency on the ISS. In response, NASA clarified on their official ISS X account that the broadcast was an error. “This audio was inadvertently misrouted from an ongoing simulation where crew members and ground teams train for various scenarios in space and is not related to a real emergency,” the ISS account explained. NASA assured the public that there was no actual emergency on the ISS.

Understanding Decompression Sickness

Decompression sickness, often known as “the bends,” occurs when nitrogen or other gas bubbles form in the bloodstream due to a change in atmospheric pressure. This condition can affect the central nervous system and is potentially fatal.

Current Status of ISS Crew

At the time of the accidental broadcast, ISS crew members were in their sleep period, preparing for a spacewalk scheduled for 8 a.m. EDT on Thursday. The broadcast on NASA’s ISS YouTube channel now displays an error message indicating that the feed has been interrupted.