CNN  —  The apparent sound made when the Titan submersible imploded in June 2023 has been revealed in new footage released Thursday by the Marine Board of Investigation, the US Coast Guard’s highest level of inquiry. Cameras on the sub’s mother ship captured the moment when Wendy Rush – whose husband Stockton founded OceanGate, the company which built the ill-fated vessel, and was one of five people who died in its implosion – heard a faint cracking sound similar to a car door slamming. “What