Did the Titanic submarine run out of oxygen?

Every time the Titan submersible sets out to explore the Titanic’s ruins, it has about 96 hours of life support left. The search for the ship and its passengers must focus on Thursday morning because it has been missing since Sunday am.

The five passengers could run out of oxygen soon before 7:10 a.m. ET, according to U.S. Coast Guard authorities, but the precise scenario onboard the missing ship and its position remained unknown as the hunt for it grew more urgent and fresh ships joined the race against time.