A doctor specialising in medicine in extreme conditions has shared what he believes the group aboard the Titan submersible face if the oxygen runs out before they can be rescued.
Dr Kenneth Ledez, a Hyperbaric Medicine Specialist at Memorial University in Newfoundland, Canada, says the group may have to be "carried out" and won't be able to rescue themselves.
He explained: "Well I mean, even if they are rescued. Let's say they are rescued after the oxygen levels drop too low., they are not going to be able to rescue themselves, they will have to be carried out.
