Richard Branson has also built a two-seater sub he says can survive a Challenger Deep descent but it seems Cameron is winning the battle to get there first.
The National Geographic and James Cameron have the Deepsea Challenge site
Deepsea Challenge Site
The Deepsea Challenger, which can sink upright, is 26 feet (eight meters) tall and took eight years to build. It uses specially designed foam to allow the new sub to weigh just 12 tonnes, about 12 times lighter than Trieste (the sub used in 1960). "It's like a clown car in there," Cameron said in a video statement. "You barely have room to get in, and then they hand you another 50 pounds of equipment."
The Cameron-designed sub is expected to allow the director to spend around six hours on the seafloor during which he plans to collect samples and film his journey with several 3-D, high-definition cameras and an eight-foot-tall array of LED light
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