Challenger Deep is 10.99 kilometers (6.83 miles) below the surface and found at the southern end of the Mariana Trench off the coast of Guam. ET Sunday (7:52 a.m. Monday, local time), James Cameron arrived at the Mariana Trench's Challenger Deep, members of the National Geographic expedition have confirmed. Deepsea Challenger (DCV 1) is a 7.3-metre (24 ft) deep-diving submersible designed to reach the bottom of Challenger Deep, the deepest-known point on Earth.On 26 March 2012, Canadian film director James Cameron piloted the craft to accomplish this goal in the second manned dive reaching the Challenger Deep. On March 26, 2012, National Geographic Explorer-in-Residence James Cameron succeeded in tackling his biggest challenge ever: a solo journey to Challenger Deep, the deepest known point in the ocean. No one had been back since, until March 26, 2012, when James Cameron, a National Geographic explorer-in-residence, made a record-breaking solo dive to the Challenger Deep in the Mariana Trench in a custom-built submersible that he co-designed. At 5:52 p.m. Cameron’s Deepsea Challenger expedition made dives to the New Britain Trench and the Mariana Trench in the southwestern Pacific Ocean between Jan. …