The US Coast Guard has released a new audio recording that appears to capture the Titan submersible’s final moments before it imploded, killing all five people on board.

When the Titan vessel was on a deep-sea expedition ... it was discovered that tapping noises had been heard from the search area by sonar buoys, raising the possibility that the crew was still ...

were picked up on sonar by a Canadian Air Force surveillance aircraft. Played for the first time in a new documentary, "The Titan Sub Disaster: Minute by Minute," the banging noise has a hollow ...