The U.S. Coast Guard has launched a Marine Board of Investigation into the implosion of the Titan submersible, which resulted in the loss of five lives onboard. The investigation will look into the cause of the implosion and any potential misconduct, and can make recommendations to pursue civil or criminal sanctions. The Titan submersible was attempting a dive to the wreckage of the Titanic when it experienced a catastrophic failure, and the Coast Guard declared a major marine casualty.