The Titan submersible imploded during a dive to the RMS Titanic wreck, killing all five people aboard. Titan (submersible): Titan, previously named Cyclops 2, was a submersible created and operated by the American underwater tourism company OceanGate. It was the first privately owned submersible with a claimed maximum depth of 4 kilometers, and the first completed crewed submersible with a hull constructed of titanium and carbon fiber composite materials. June 18, 2023. Wiki link