ESA astronaut Andreas Mogensen tests an underwater transport device as part of NASA's underwater training mission 6 September 2014.
Andreas Tweeted this image with the caption: "My best James Bond impression."
NEEMO – NASA Extreme Environment Mission Operations – trains astronauts for life in space. Living and working in an underwater base is similar to being on a space station.
NEEMO’s underwater habitat off Florida acts as makeshift a space base for astronauts to make regular ‘waterwalks’ in full scuba gear. Both underwater missions plan sorties for the astronauts to simulate spacewalks. Different gravity levels test tools that could be used when humans land on the Moon, Mars or even asteroids.