NASA astronaut Butch Wilmore reported hearing a strange, sonar-like noise from a speaker inside the Boeing Starliner spacecraft docked to the ISS. Despite extensive attempts by Wilmore and Mission Control to identify the source, the origin of the noise remains unknown. The Starliner has faced multiple technical issues, including thruster failures and helium leaks, which stranded Wilmore and Sunita Williams on the ISS since June. Due to these persistent problems, NASA has decided that the astronauts will return to Earth in February 2025 using a SpaceX Crew Dragon capsule, while the Starliner will attempt an unmanned return on September 6, 2024. The incident has generated widespread speculation and concern, including comments from retired astronaut Chris Hadfield.