evidence: Hearings have begun into the deadly implosion of the Titan, an experimental submersible that disappeared during a dive to the wreckage of the Titanic in June 2023. The days-long search for the vessel drew global attention and shone a light on the unregulated industry of deep-sea tourism. [...] The Coast Guard hearing into the deadly 2023 implosion has revealed questions over the Titan’s safety and the submersible’s last messages to the surface.