The Coast Guard’s final report on the tourist submersible that disappeared on a dive to the Titanic concluded that the disaster, which killed the operator and four passengers, resulted from a series of safety and design failures.

“This marine casualty and the loss of five lives was preventable,” said Jason Neubauer, who led the two-year inquiry for the Marine Board of Investigation, which issued a more than 300-page report Tuesday morning.

The submersible, known as the Titan and operated by a company called OceanGate, disappeared in June 2023 on a trip to view the wreck of the Titanic ocean liner. It lost contact an hour and a half into the dive, and prompted a sprawling search effort in the dark depths of the Atlantic Ocean. The craft’s remains were discovered on the fourth day by a rem

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