an lifeguards. Powered with a tiny electric pump that shoots a forceful stream of water, the 4-ft.-long robotic buoy has been tested at California's Zuma Beach. The device is operated by remote, but next year's model features sonar technology controlled with an iPhonc app that will allow EMILY to detect ri

n lifeguards. Powered with a tiny electric pump that shoots a forceful stream of water, the 4-11.-Iong robotic buoy has been tested at California's Zuma Beach. The device is operated by remote, but next year's model features sonar technology controlled with an iPhone app that will allow EMILY to detect rip