A doctor has offered families of the missing Titanic vessel crew a glimmer of hope after he claimed they could survive for longer than expected.
Breathable air is expected to run out on OceanGate's 'Titan' around midday UK time on Thursday, giving an added urgency to ongoing efforts to save the five people thought to be trapped aboard.
The submersible was estimated to have about 96 hours of air when it set off from the North Atlantic coast of Canada on Sunday morning, where it was due to travel thousands of feet underwater to the shipwreck of the Titanic.
