The first step in the Deep Sentinel program, one of the most ambitious ocean-engineering projects in decades, will be completed this year. This initial step, called Vanguard, will shelter three aquanaut-scientists at depths of 100 meters. Eventually, the project will create a modular underwater habitat system that will let scientists live underwater for weeks at a time.
The trouble with these commenters is that they don’t read the articles. This one isn’t at all about getting people to move underwater, it’s very specifically about habitats for ocean researchers to live in, rather than spending enormous amounts of time decompressing after relatively short dives.