James Cameron's Warning About Titanic Submarine Tragedy.

James Cameron, director of "Titanic" and renowned deep-sea explorer, said many warnings were ignored about the safety of the tourist submersible that imploded near the famous shipwreck, killing five people. The sub, dubbed Titan, had been the source of widespread concern in the close-knit ocean exploration community, and drew parallels to the 1912 ocean liner sinking in which around 1,500 people died. Cameron said the risk of a sub imploding under pressure was always “first and foremost” in engineers’ minds.