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Challenger Deep

The deepest point of the Mariana Trench is called The Challenger Deep, so named after the British exploration vessel HMS Challenger II, and it is located 210 miles south-west of Guam. A depth of -10,911 meters was reached in 1960 by the Trieste, a manned submersible owned by the U.S. Navy.
The descent took almost five hours and the two men spent barely twenty minutes on the ocean floor before undertaking the 3 hour 15 minute ascent.
The Pressure at the deepest part of the Mariana Trench is over 8 tons per square inch.

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