Diving Without Decompression Sickness
An atmospheric diving suit is a suit of armor that keeps you at normal surface pressure even when you are 2,300 feet underwater. Because you never experience high pressure, you skip decompression entirely.
These submersible suits function like a personal submarine rather than a traditional scuba outfit. By maintaining internal pressure at one atmosphere, the suit removes the risk of nitrogen narcosis and the dreaded bends. Divers can spend hours at extreme depths and return to the surface instantly without needing to linger in a chamber. While these suits make you feel a bit like a clumsy robot, they open up the deep sea to non-experts.
Source: Atmospheric diving suit