SEATEST II undersea exploration
SEATEST II, an acronym for Space Environment Analog for Testing EVA Systems and Training (number two), is a NASA underwater mission in the Aquarius underwater laboratory in preparation for future space exploration. The objectives for this exercise are largely focused on the evolution of EVA (extravehicular activity) tools, and maturing some technologies that could have implications for the ISS and future exploration missions (MED and JITT delivery.)

Aquarius, an underwater habitat located near Key Largo, Florida, is owned by the National Oceanic and Atmospheric Administration (NOAA) and operated by Florida International University (FIU) as a marine biology study base. Located roughly 62 feet underwater, NASA has used it since 2001 for a series of missions, called NEEMO for "NASA Extreme Environement Mission Operations", usually lasting 10 to 14 days, with research conducted by astronauts and other NASA employees. The crew members are called aquanauts instead of "divers", and they perform EVAs in the underwater environment.[1] Groups of NASA employees and contractors live in Aquarius for up to three weeks at a time. For NASA, Aquarius provides an environment similar to space living, and NEEMO crew members experience some of the same tasks and challenges underwater as they would in space.
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