ARROWS is an EU-funded project that focuses on creating underwater vehicles and technology to help lower the cost of underwater archeology. When divers explore sites, it's expensive and time consuming. But a robot—as is the case with most of our mechanical friends—can do it cheaper and more efficiently, and can explore more dangerous sites. The small, agile U-CAT specifically has locomotion similar to sea turtles, with four flippers that are independently driven, allowing it to move forward, backward, up, down, and turn on the spot. The robot's camera then transmits images from the site back to humans on the surface.