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Message: <blockquote data-quote="Matratliff" data-source="post: 4337762" data-attributes="member: 48729"><p>Subjective of course. To become qualified as a commercial diver, the deepest depth you have to do is 165-ft for X amount of dives. Then after surfacing, we finished with a chamber ride for decompression. Most folks in my field will go their entire careers and never go past 220-ft. So, to me real depth is planning a working dive past 300-ft or about 10 atmospheres. That’s off the standard Navy dive charts and you need to know what you’re doing. Working dive meaning, you are on-gassing at that depth for a decent amount of time before starting your ascent or off-gassing. Then the ascent itself is tricky.</p></blockquote><p></p>