Planes and ships from the US and Canada are searching a remote area of the North Atlantic for a submersible that went missing during a dive to the wreck of the Titanic, more than 24 hours ago.

The US Coast Guard said last night that the sub could have around seventy hours of oxygen left, and that officials were doing everything they could to rescue those missing.

A pilot and four passengers - one of them the founder of Ocean Gate Stockton Rush - are on board the vessel, which can reach depths of 13-thousand feet.

Mishal heard from Dr Robert Blasiak an ocean researcher at Stockholm Resilience Centre about the Titan submersible craft and from Simon Platts who journeyed in the craft while directing an episode of the BBC's 'Travel Show' last year.

Photo credit: American Photo Archive/Alamy/PA Wire