By
OurAmazingPlanet
updated 4/29/2012 12:19:15 PM ET 2012-04-29T16:19:15

Barely a month after filmmaker James Cameron piloted a newfangled submersible to the bottom of the Mariana Trench, audiences can get an inside look at the historic expedition that for the first time sent a lone human to the deepest place on Earth.

A half-hour special will air on Sunday, April 29, on the National Geographic Channel, offering viewers a chance to hear Cameron's own account of his seven-hour journey to the seafloor and back.

The man behind the blockbuster films "The Abyss," "Titanic" and "Avatar" began his descent to the Challenger Deep  — 35,756 feet (10,890 meters), or nearly 7 miles (11 km) beneath the surface of the sea — at 5:15 a.m. local time on March 26.

In an intimate interview, Cameron discusses the moments leading up to his dramatic plunge, and describes his speedy descent. He roared past the depths where the wreckage of the Titanic rests (in the Atlantic Ocean), and at around 21,000 feet (6,500 m), beyond the reach of any other submersible today.

Finally, as the lights from his Deepsea Challenger submersible set the seafloor aglow, Cameron came to rest at one of the most isolated spots on the planet. That's when the phone rang. It was his wife.

Cameron not only recounts stories like these in the 30-minute program, but offers up footage of the dive itself, and scenes of the hubbub aboard the support ship.

The program also offers high-tech animations that reveal the truly gargantuan scale of Cameron's two-hour journey to the seafloor. [ Infographic: James Cameron's Mariana Trench Dive ]

Cameron partnered with National Geographic and watchmaker Rolex to bankroll the endeavor, which was seven years in the making.

"More money gets put into space exploration, but the ocean is our life support here on spaceship Earth," Cameron said in a statement. "And we're destroying it faster than we're exploring it. I think it draws attention to the ocean and the lack of funding for ocean exploration."

The deep sea — roughly defined as everything below 650 feet (200 m) — comprises a stunning 240 million cubic miles (1 billion cubic kilometers) and more than 90 percent of the living space on the planet, and it is virtually unexplored.

Twelve people have walked on the moon, but only three have ever visited the Mariana Trench, the deepest spot on our planet. (The other two visited in 1960, aboard the bathyscaphe Trieste.)

The National Geographic special, "James Cameron: Voyage to The Bottom of the Earth," premieres Sunday, at 9 p.m. and 9:30 p.m. ET/PT on the National Geographic Channel. The show will run again on Thursday, May 3, at 9 p.m. & 9:30 p.m. ET/PT.

Follow OurAmazingPlanet for the latest in Earth science and exploration news on Twitter @OAPlanet and on Facebook.

© 2012 OurAmazingPlanet. All rights reserved. More from OurAmazingPlanet.

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