to 3000 meters. By 6000 meters, most of the ocean is drained except for the deep ocean trenches , the deepest of which is the Marianas Trench at a depth of 10,911 meters. Date 19 December 2007 ( 2007-12-19 ) Source http://svs.gsfc.nasa.gov/goto?3487 Converted from the TIFF frames using avconv . Author NASA/Goddard