Further soundings made by the US Center for Coastal & Ocean Mapping in October 2010 are in agreement with this figure, preliminarily placing the deepest part of the Challenger Deep at 10,994 m (36,070 ft), with an estimated vertical uncertainty of ±40 m (131 ft).
https://en.wikipedia.org/wiki/Challenger_Deep
Deep underwater, not too far from Guam, lies a crescent-shaped canyon called the Mariana Trench. It is home to the deepest known spot in the ocean: The Challenger Deep. That’s what I found out from my friend Ray Lee. He teaches biology at Washington State University and studies animals that live in the deep sea. A few explorers have made the nearly seven-mile journey to the Challenger Deep.
https://askdruniverse.wsu.edu/2016/06/15/deepest-spot-ocean/
The closest land to the Challenger Deep is Fais Island (one of the outer islands of Yap), 287 km (178 mi) southwest, and Guam, 304 km (189 mi) to the northeast. It is located in the ocean territory of the Federated States of Micronesia, 1.6 km (1 mi) from its border with ocean territory associated with Guam.
https://en.wikipedia.org/wiki/Challenger_Deep
The trench is 120 times larger than the Grand Canyon and is more than a mile deeper than Mount Everest is tall. (MORE: The Bottom of the Ocean: What Cameron Says He Saw on His Dive) The Titanic director’s solo journey to the ocean’s deepest point took nearly three hours. He departed at 5:15 a.m. Monday local time from a starting point 200 miles (320 km) southwest of the Pacific island of Guam. He touched down at 7:52 a.m. local time (5:52 p.m.
http://newsfeed.time.com/2012/03/25/james-cameron-reaches-oceans-deepest-point-7-miles-below/
(UPDATED: Monday 3/26, 11 a.m.) The very barren bottom of the Mariana Trench had a visitor Sunday night: filmmaker James Cameron. After years of preparation, Cameron descended 35,756 ft. (10,898 m) beneath the ocean’s surface in his 12-ton lime green submarine called Deepsea Challenger.
http://newsfeed.time.com/2012/03/25/james-cameron-reaches-oceans-deepest-point-7-miles-below/
The Challenger Deep is the deepest known point in the Earth's seabed hydrosphere, with a depth of 10,898 to 10,916 m (35,755 to 35,814 ft) by direct measurement from submersibles, and slightly more by sonar bathymetry. It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group.
https://en.wikipedia.org/wiki/Challenger_Deep
To give you an idea of just how deep the Mariana Trench is, if Mt. Everest were placed in the deepest part, there would still be over a mile of water above its peak! The Challenger Deep is named after a British Royal Navy ship called the HMS Challenger.
http://wonderopolis.org/wonder/where-is-the-deepest-place-on-earth/
That's 1.7 miles down! The average depth of the ocean is about 12,100 feet. The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 36,200 feet deep.
http://oceanservice.noaa.gov/facts/oceandepth.html
The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor. Its bottom is about 11 km (7 mi) long and 1.6 km (1 mi) wide, with gently sloping sides.
https://en.wikipedia.org/wiki/Challenger_Deep
Beneath the surface of the Pacific Ocean to the southeast of Japan, there is a very deep, crescent-shaped trench called the “Mariana Trench.. Near the southern tip of the crescent, there is a small slot-shaped area called the “Challenger Deep.. With a measured depth of approximately 36,000 feet below sea level, a journey to the bottom of the Challenger Deep is nearly seven miles, making it the deepest known place on Earth.
http://wonderopolis.org/wonder/where-is-the-deepest-place-on-earth/
how deep is the deepest part of the ocean?
 The deepest part of the ocean is 36,200 feet. The deepest part of the ocean is 36,200 feet deep .