A large search operation is underway to find a submarine with five people on board that went missing Sunday on a trip to find the Titanic wreckage.
U.S. Coastal Guards say that that the crew has about 40 hours left of breathable air in an update 1 p.m. ET on Sunday.
On the vessel of five people are a British adventure, a French diver, a Pakistani father and son, and the owner company which operates the tour.
Titanic remains sit nearly 13,000 feet below sea level, south of Newfoundland, Canada.
by Ryan Griffin