Easter egg: In the Special Edition DVD (with the white slipcover), if you go to the menu which tells about the equipment of "The Abyss", go to the "surface", where it talks about the wave and the Benthic Explorer. If you hit the up arrow on the wave, the plane flying overhead is highlighted. Select it to see a trailer for "True Lies," a movie that James Cameron directed.
Easter egg: In the Special Edition DVD (with the white slipcover), in the Imaging Station, if you go to the top of the stack of the videotapes and hit the right arrow button, the TV screen changes to say, "They mostly come at night. Mostly." Hit "enter" to see a trailer for "Aliens," a movie James Cameron directed.





Answer: At the depth you're asking about, the water pressure is not enough to crush a diver's unprotected body (which is mostly solid/liquid and thus relatively hard to compress). The only thing they have to worry about is their lungs (gases, and therefore things containing gases, are much easier to compress). This worry is addressed by the pressure and composition of the air that they breathe on the rig, in their submersibles, and in their air tanks - this air has different proportions of gases (especially oxygen) compared to surface air, and is also at a significantly higher pressure - high enough to counter the pressure of the water that deep. (Side note: another way you can tell the atmosphere they are breathing in the rig is set at the same pressure as the water at that depth is that there is open water in the moon pool - and it's not rushing in to fill the entire rig, which it would if the air pressure was less than the water pressure).
Aerinah