Time is running out to find the missing 5 passengers onboard the submersible that lost contact whilst on an excursion to view the wreckage of the Titanic.
Oxygen supplies are believed to be able to last until Thursday, but only if the vessel's hull remains intact.
The US Coastguard said underwater noises were detected by a Canadian search and rescue aircraft but a precise location has not been determined.
A former senior Royal Navy officer has described the trip itself as "fundamentally dangerous".
Retired rear admiral Chris Parry believes the odds of finding the missing sub Titan are "vanishingly small".
In: You've got this…
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