Searchers for Titanic Tourist Sub Heard ‘Banging’ From Area, Internal Comms Reveal
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rollingstone.com
An aircraft heard sounds at 30-minute intervals from the area where the sub disappeared, according to internal e-mails sent to DHS leadership obtained by Rolling Stone
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As an emergency supply, yes. However, it is unclear how much of it is left. People/news quote hour estimations, but it is anyone's guess really. People in panic consume more oxygen. Additionally, it is still unclear what happened. For example, if they had a leak, they will probably have different problems than oxygen.
Let's just hope that they manage to find them, at least in those 96 hours.
If they had a leak their problems are over given the pressures involved.
If they are not on the surface finding them is not the hardest part...