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In a bathysphere, where the inside is at atmospheric pressure, tens of thousands of feet.

In a hard suit, where the inside is at atmospheric pressure, a thousand feet depending

on the suit. Ditto submarines.

Scuba diving with compressed air, about 100 feet before you get nitrogen narcosis.

Free diving, with weights pulling you down, I think the record is something like 500 feet. People die trying this.

"Technical" diving, with oxygen/argon/helium mixtures, hundreds of feet.

Records are much deeper than people can actually work.

Note: messing around diving with home-made compressors or no training can kill you real fast.

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16y ago

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