how deep can man dive in the ocean
Deep diving Amongst technical divers, there are divers who participate in ultra-deep diving on SCUBA below 200 metres (660 ft). This practice requires high levels of training, experience, discipline, fitness and surface support. Only twelve persons are known to have ever dived below a depth of 240 metres (790 ft) on self-contained breathing apparatus recreationally.[21][22][nb 4][nb 5] That is the same number as the number of people who walked on the moon. The Holy Grail of deep scuba diving was the 300 m (980 ft) mark, first achieved by John Bennett in 2001, and has only been achieved five times since.
Navy diver (United States Navy) Navy divers work in extreme conditions, performing various underwater tasks ranging from underwater ship repair, underwater salvage and special operations/special warfare type diving. Because their area of operations are so varied, they can be required to utilize any type of diving equipment for use in any depth or temperature in any part of the world. Certain diving qualification allows NDs to live and work at extreme depths for days or weeks at a time, a discipline known as saturation diving.