US Coast Guard: Crew on missing Titanic sub have just 20 hours of breathable air remaining

Noises have been detected from the search area of the missing deep-sea vessel near the wreck site of the Titanic as those on board face a dwindling supply of oxygen

The OceanGate Expeditions vessel used to examine the wreckage site of the Titanic. (Action Aviation, PA)

The five-man crew of the submarine which went missing during a voyage to the wreck of the Titanic may have less than 20 hours of breathable air remaining, if they are still alive, a US Coast Guard official has said.

The sub, named Titan, lost communication with tour operators on Sunday while about 435 miles south of St John’s, Newfoundland, during a voyage to the shipwreck off the coast of Canada.