Rescue workers continue the hunt for the Titanic submersible with the oxygen supply on board expected to run out just after midday today.
The vessel, named Titan, lost communication with tour operators on Sunday while about 435 miles south of St John's, Newfoundland, during a voyage to the Titanic shipwreck off the coast of Canada.
The oxygen supply for the five men on board has dwindled to perilously low levels leaving them with only a few hours of breathable air left by Thursday morning.