The search is ongoing for a missing vessel used to explore the Titanic.
The U.S. Coast Guard says search efforts that began Sunday have yet to yield any results.
It's believed the submersible has less than 40 hours of oxygen left.
Overnight there were reports that there was a banging sound heard in thirty minute intervals, but the Coast Guard says so far the search has yielded no results.
The search location is about 900 miles off the coast of Cape Cod.
(Photo by Scott Eisen/Getty Images)