At nearly seven miles below the water's surface, the Mariana Trench is the deepest spot in Earth's oceans. And the site north of Guam is where director and explorer James Cameron recently fulfilled a longtime goal of reaching the bottom in a manned craft.
For the dive, Cameron designed a 24-foot submersible vehicle, the Deepsea Challenger — "this kind of long, green torpedo that moves vertically through the water," as he tells All Things Considered's Melissa Block.
Cameron was able to watch his descent, he says, through a window that was about 9-1/2 inches thick.
Here's how Cameron describes his call to his ship, after reaching his destination:
"Surface, this is DEEPSEA CHALLENGER. I am on the bottom. Depth is 35,756 feet ... life support's good, everything looks good." Only now does it occur to me that I might have prepared something more memorable, like "One small step for man."
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