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The five people on the missing Titan submersible have until 12.08pm UK time before their oxygen runs out, the Coastguard has said, as officials insisted they were still carrying out a search and rescue mission.
The oxygen on board the Titan submersible lost beneath the Atlantic ran out shortly after midday on Thursday - but what happens when there is no breathable air left?
The five people on the missing Titan submersible have until 12.08pm UK time before their oxygen runs out, the Coastguard has said, as officials insisted they were still carrying out a search and rescue mission.