Using normal SCUBA apparatus and wet suit, how much pressure can the human body withstand? This is assuming that they descend as gradually as necessary for their body to make adjustments. What would be first symptoms that they experience as they descend? And if they descend to the deepest depth that they can reach without immediate permanent harm, how long can they spend at that depth before time related symptoms set in?
The previous record was 1,044 ft set in 2005 so (as with most human endurance & physical achievement records nowadays) we're most likely at the limit of the possible there.
Barring a few more feet (or even just inches) of course.
Howsoever, that's only normal scuba diving equipment
So the answer depends on if you're asking about with normal commercial scuba gear using bog standard compressed air or if you want to include breathing mixes etc to help alleviate the bends.