Float Fleet (IMAGE) University of California - Berkeley Caption The floating robots on the left are passive, going where the currents take them. The devices on the right are autonomous and have propellers that help them maneuver away from obstacles in the water. Credit Jonathan Beard Usage Restrictions All rights reserved. Non-commercial use only with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.