Even a small dent in the shape could have catastrophic consequences. ![]() While the Titan has been built to withstand such a crushing, it must stay in very round shape to spread the pressure consistently across the hull. At 12,500 feet down – the depth of the Titanic – the craft will need to resist more than 6,000 pounds of force per square inch. Submersibles face increasing pressure as they dive deeper. The craft may have built-in breathing systems – a kind of oxygen mask for use in an emergency. As well as frying electrical systems, the crew would face the immediate danger of toxic fumes that would quickly burn up air supplies and create a poisonous atmosphere. FireĪ short circuit on board could have led to sparks and a fire. ![]() However, experts warned that it would be “a long climb” back up to the surface if the drop weight had been deployed. ![]() Prof Alistair Greig, professor of marine engineering at University College London, said: “Submarines are not designed to be on the surface, so it would be mighty uncomfortable for the occupants.”
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