The Tragic Fate of the Doomed Titanic Submarine.

The five-man crew of the Titan submersible, which was on a mission to explore the wreckage of the Titanic, died in a "catastrophic implosion" around 900 miles east of Cape Cod, Massachusetts. The submersible lost contact with the surface ship an hour and 45 minutes into the voyage, and a search-and-rescue mission was carried out for four days. The bodies of the crew may never be recovered. The search was the deepest underwater search-and-rescue mission ever, involving multiple agencies and countries. The crew included British explorer and billionaire Hamish Harding, who had travelled to the bottom of the ocean and into space.