Which is the deepest point in the world's oceans?

The Challenger Deep, located in the Mariana Trench in the western Pacific Ocean, is the deepest known part of the global ocean. Measurements vary slightly depending on the method used, but it is generally around 10.9 kilometers below sea level. The trench was named after the British survey ship HMS Challenger, which helped map the area in the 19th century. Only a small number of crewed and robotic dives have reached this extreme environment.