Urashima, a deep sea cruising autonomous underwater vehicle.  Photographed on the open house day of the JAMSTEC Headquarters in the city of Yokosuka, Kanagawa Prefecture, Japan.
<a href="//commons.wikimedia.org/w/index.php?title=User:Kestrel&amp;action=edit&amp;redlink=1" class="new" title="User:Kestrel (page does not exist)">Kestrel</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>