The Brief The Titan submersible disaster that killed five on way to Titanic ruins in 2023 was preventable, the Coast Guard says. The Coast Guard released the findings Tuesday from its highest level of investigation. The Coast Guard released its report this week on the Titan submersible disaster that killed five people on the way to the Titanic wreckage. (Photo by Jason Redmond/AFP ExpandThe backstory:The Coast Guard convened its highest level of investigation in the aftermath of the 2023 implosion off Canada. The operator of the submersible, OceanGate head Stockton Rush, was among the five on board who died.