The U.S. Coast Guard has released a 20-second audio clip believed to have captured the final moments of the Titan submersible before it imploded in June 2023 amid a voyage to visit the Titanic.

FILE – Debris from the Titan submersible, recovered from the ocean floor near the wreck of the Titanic, is unloaded from the ship Horizon Arctic at the Canadian Coast Guard pier in St. John’s, Newfoundland, Wednesday, June 28, 2023. (Paul Daly/The Canadian Press via AP, File)