During Neemo missions, aquanauts employ a technique known as saturation diving to live and work in the Aquarius Reef Base underwater habitat for weeks at a time. Aquarius is an ambient pressure habitat, meaning its atmospheric pressure is equal to the surrounding water pressure -- about 2.5 times that of surface level at the habitat’s depth.
Aquarius is an underwater ocean laboratory located in the Florida Keys National Marine Sanctuary. The laboratory is deployed three and a half miles offshore, at a depth of 60 feet, next to spectacular coral reefs. Scientists live in Aquarius during 10–day missions using saturation diving to study and explore our coastal ocean. Aquarius is owned by NOAA and is operated by the University of North Carolina Wilmington.