U-CAT is autonomous, so it doesn't require a control cable that could get snagged or tangled. It also has an onboard video camera, which records video that can later be used to visually map out the inside of the shipwreck. Plans call for the technology to be tested at underwater archeological sites in the Mediterranean Sea and the Baltic Sea. The idea is that U-CATs could ultimately be used in conjunction with other underwater robots that are too large to enter wrecks, and too expensive to risk losing within them. Once they get into regular service, U-CATs might not be the only robotic turtles in the sea. Scientists from the ETH Zurich research group are developing a roboturtle of their own, known as naro-tartaruga.

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• Country: Estonia 
• Company: Tallinn University