10,898 m (35,755 ft) to 10,916 m (35,814 ft) Replying to: How deep is the deepest sea? -- q4 Post ReplyForum rolf 06/20/2012, 08:15:16 Author Profile | Edit The Challenger Deep is the deepest known point in the Earth's sea floor hydrosphere, with a depth of 10,898 m (35,755 ft) to 10,916 m (35,814 ft) by direct measurement from submersibles). It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group. Recommend | Alert | 5 4 3 2 1 0 -1 -2 -3 -4 -5 Where am IGo Up Go TopPost ReplyBack