JAXA astronaut/NEEMO 16 aquanaut <a href="https://en.wikipedia.org/wiki/Kimiya_Yui" class="extiw" title="en:Kimiya Yui">Kimiya Yui</a> performs tasks during an underwater EVA while using a jetpack.  The NEEMO 16 aquanauts are testing various methods which may be used on EVAs by future astronauts on a mission to a near-Earth asteroid.  NASA photo in public domain.
NASA
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