NASA has started testing its new Buoyant Rover for Under-Ice Exploration (BRUIE) prototype, and as you can see above, it looks markedly different from its predecessor. It's taller, thicker, has rotating segments to be able to take pictures from different directions and can withstand depths up to 700 feet.
prototype also has communications equipment and sensors similar to
those used for Mars Cube One.
That's the communications CubeSat slated to escort the InSight lander
to the red planet.
The agency recently put the new BRUIE to the test for
a few days inside a 188,000-gallon tank at the California Science
Center, where it spent its time taking photos of tropical fish. It was
attached to a corner and didn't have its wheels in the aquarium, but
it'll most likely get them back for its next test run near one of the
Provisionally called the Buoyant Rover for Under-Ice Exploration
(BRUIE), this rover would normally float and have wheels. Its wheels
would roll along on the underside of ice, as if the ice were the ground.
Operating underwater, the rover would take images and collect other
data to help scientists understand the important interface between ice