Nearly two years after the OceanGate Titan implosion, the U.S. Coast Guard has released a chilling audio recording that seemingly captured the submersible’s final moments.

The roughly 20-second clip, which was released on February 7, featured a static sound then a loud whooshing noise followed by an eerie silence.

The Coast Guard revealed that the audio was captured 900 miles from the sub by a National Oceanic and Atmospheric Administration device. It was described as a recording of the “suspected acoustic signature” of the submersible’s implosion on June 18, 2023.

On the day of the tragedy, five passengers — OceanGate CEO and cofounder Stockton Rush, deep sea explorer Paul-Henri Nargeolet, British businessman Hamish Harding, Pakistani businessman and philanthropist Shahzada Dawood and his 19-year-old son, Suleman Dawood — boarded the submersible to embark on a deep-sea expedition to visit the remnants of the RMS Titanic.

The Titanic sank on April 15, 1912, after it struck an iceberg around 11:40 p.m. the night before during its maiden voyage to New York, claiming the lives of more than 1,500 people to become one of the most profound maritime tragedies in history. Tickets for the expedition to visit the wreckage were said to cost $250,000.

The Titan worked in tandem with its mother ship, the Polar Prince, but the two vessels lost contact with each other nearly two hours into the voyage.

OceanGate, which offered crewed submersibles until it suspended operations in July 2023, contacted the Coast Guard to conduct a search. Four days later, the Coast Guard announced that an underwater ROV had discovered debris scattered along the ocean floor that were “consistent with a catastrophic loss of the pressure chamber.” They immediately notified the families of the victims.

It was also revealed at the time that the Titan did not make it to the Titanic wreckage. The submersible’s tail cone was discovered “approximately 1,600 feet from the bow of the Titanic,” according to the Coast Guard.

The remnants of the sub were recovered from the ocean floor and transported to St. John’s in Newfoundland, Canada, in late June 2023. The Coast Guard revealed that they discovered “presumed human remains that have been carefully recovered within the wreckage at the site of the incident.”

The audio recording of the implosion was released as part of an ongoing investigation into what happened to the submersible. The Coast Guard’s Marine Board of Investigation (MBI) previously conducted hearings about the incident in September 2024, where photos and video footage of the Titan wreckage were shared, as well as details about the Polar Prince’s final communications with the sub.

“I need better comms from you,” someone aboard the mother ship told Nargeolet, 77, after 15 minutes of not hearing anything from the Titan. The sub responded that they were “all good here,” but contact was lost an hour and 45 minutes into the dive.

“Over the past 15 months, our team has worked continuously in close coordination with multiple federal agencies, international partners and industry experts to uncover the facts surrounding this incident,” MBI chair Jason Neubauer said in a press conference in September 2024.

He continued, “The upcoming hearings will allow us to present our findings and hear directly from key witnesses and subject matter experts in a transparent forum. [The proceedings] are a critical step in our mission to understand the contributing factors that led to the incident and, even more importantly, the actions needed to prevent a similar occurrence.”