James Cameron Shooting Avatar Sequels 6.8 Miles Underwater It's been revealed that director James Cameron is taking the Avatar sequels to the underwater worlds of Pandora, but apparently he wants to shoot the them 6.8 miles beneath the surface of the ocean. The director is also aiming to win the $10 million X-Prize at the same time, according to Daily Mail. Winning the http://www.xprize.org|X-Prize} will just be a bonus for James Cameron in his quest to the bottom of the sea, as his real goal is to be able to travel deep underwater to shoot the film. The X-Prize is an award given to pioneers in privately funded science and exploration. It was previously given to the first team to build a privately funded, manned spacecraft and launch it out of Earth's atmosphere. Now it's going to the first private crew to make two manned dives to Challenger Deep, the deepest surveyed point in all of Earth's oceans. Last weekend it was reported that James Cameron has commissioned a bespoke submarine, built of high-tech, man-made composite materials and powered by electric motors, which will be capable of surviving the tremendous pressures at a depth of seven miles, from which he will shoot 3D footage that may be incorporated in Avatar 3's sequel. No one has visited Challenger Deep since explorers Jacques Piccard and Don Walsh made the journey half a century ago. The X-Prize was announced to commemorate their voyage.