Director James Cameron has reached the Earth's deepest point _ someplace only two men had gone before.

The director of "Titanic" and other films used a specially designed submarine called "Deepsea Challenger" to dive nearly seven miles. He completed his deep dive early Monday local time, according to Stephanie Montgomery of the National Geographic Society.

He plans to spend about six hours exploring and filming the Mariana Trench, about 200 miles southwest of the Pacific island of Guam.

Swiss engineer Jacques Piccard and Don Walsh, a U.S. Navy captain, are the only others to reach the spot. They spent about 20 minutes there during their 1960 dive but couldn't see much after their sub kicked up sand from the sea floor.