Ship footage captures sound of Titan sub imploding2 days ago Share Save Rebecca Morelle • @BBCMorelle Science Editor Alison Francis Senior Science Journalist Share SaveStockton Rush's wife Wendy asks "what's that bang?" in footage that appears in new BBC documentaryThe moment that Oceangate's Titan submersible was lost has been revealed in footage recorded on the sub's support ship. The BBC has had unprecedented access to the US Coast Guard's (USCG) investigation for a documentary, Implosion: The Titanic Sub Disaster. Carbon fibre is a highly unusual material for a deep sea submersible because it is unreliable under pressure. You can watch Implosion: The Titanic Sub Disaster on 9pm on Tuesday 27 May on BBC Two.