Crews race to find Titanic sub lost in vast North Atlantic

US coastguard official says authorities are conducting ‘complex search effort’ with 40 hours of oxygen left in vessel. Washington, DC – Search and rescue crews are racing under challenging conditions to locate a submersible vessel that had been exploring the wreckage of the Titanic before it went missing in the Atlantic Ocean, a United States coastguard official says. Captain Jamie Frederick told reporters on Tuesday that the US coastguard and navy, the Canadian military and coastguard, and the vessel’s parent company, OceanGate Expeditions, are working under a unified command to...