Rescuers race against time to find submersible visiting Titanic wreck

The submersible, Titan, is missing (American Photo Archive/Alamy/PA)

Rescue teams are in a race against time to find a submersible tourist vessel which went missing during a voyage to the Titanic shipwreck off the coast of Canada, with a British billionaire among five people aboard.

There may be as little as 57 hours of emergency oxygen left aboard the submersible, which lost communication with tour operators on Sunday while about 435 miles south of St John’s, Newfoundland.