Scary animation shows how deep missing Titanic sub could be - with century-old shipwreck stuck on ocean floor 12,500ft down (TWICE as deep as the Grand Canyon)<br /><br />As officials race against time to save five people aboard the missing Titanic submersible, an immersive new video shows how deep it could be. <br /><br />As it goes, the heights of multiple landmarks are depicted in the water, including the Eiffel Tower, the Statue of Liberty and Burj Khalifa, the world's tallest building. <br /><br /><br />Eventually, the camera reaches 12,000ft (3,700 metres) down – the bottom of the North Atlantic, where the remains of the Titanic sit.<br /><br />The Titan submersible, operated by US firm OceanGate, started its dive on Sunday morning but all contact with its mothership was lost shortly after.<br /><br /> One of Pakistan's richest men, Shahzada Dawood, is aboard the vessel alongside his son Suleman, British billionaire Hamish Harding, OceanGate chief executive Stockton Rush and French explorer Paul-Henry Nargeolet.<br /><br />The five people have only around a day of oxygen left, according to authorities, as of Wednesday morning UK time.<br /><br />Scary statement shows how deep missing Titanic sub could be century-old shipwreck stuck on ocean floor 12500ft down