The average depth of the ocean is about 12,100 feet.The deepest part of the ocean is called the Challenger Deep Is located beneath the western Pacific Ocean in the southern end of the Mariana Trench,which runs several hundred kilometres southwest of the U.S territorial islands of Guam.
At 5:52 p.m. 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. His depth on arrival: 35,756 feet (10,898 meters)—a figure unattainable anywhere else in the ocean.
