The search is continuing in the North Atlantic Ocean for a missing vessel that was used to explore the Titanic.
The United States Coast Guard is leading the search for the submersible operated by OceanGate Expeditions, which lost communications on Sunday.
The search area is about nine-hundred miles east of Cape Cod.
The sub that is carrying five people is apparently not equipped with a signal-location device.
But, officials reportedly detected a banging sound on Tuesday.
Officials say the air may run out as early as tomorrow morning.
(Photo by JOSEPH PREZIOSO/AFP via Getty Images)