What is the deepest dive ever done?

How deep can navy divers go?

First class divers could work 300 ft (91 m) depths while salvage and second class divers were qualified down to 150 ft (46 m).

Has a human been to the bottom of the Mariana Trench?

On 23 January 1960, two explorers, US navy lieutenant Don Walsh and Swiss engineer Jacques Piccard, became the first people to dive 11km (seven miles) to the bottom of the Mariana Trench.

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