Oxygen on the missing Titanic submersible is expected to run out by the end of this morning with a 'miracle' now needed to find it in time as banging every 30 minutes is still being heard from the depths but has not been located.
The vessel, named Titan, lost communication with tour operators on Sunday while about 435 miles south of St John's, Newfoundland, during a voyage to the Titanic off the coast of Canada. The last 'ping' of its homing device was heard on Sunday afternoon - directly above the world's most famous seawreck.
Those stuck onboard, dubbed the Titan Five, includes British billionaire Hamish Harding, OceanGate CEO Stockton Rush, French navy veteran PH Nargeolet and Pakistani businessman Shahzada Dawood and his son Suleman.
Rescue efforts to find them have continued overnight - and are becoming ever more desperate - with just hours to pinpoint 'banging' from the deep and save them. Ten ships and at least two remote subs are actively searching with more on the way today.
The great final hope is French research vessel L'Atalante, which arrived in the search zone around 2am this morning. It is carrying the Victor 6000 - a robot sub that can reach depths of 20,000ft.