An underwater navigation system powered by sound

Boston MA (SPX) Nov 03, 2020

GPS isn't waterproof. The navigation system depends on radio waves, which break down rapidly in liquids, including seawater. To track undersea objects like drones or whales, researchers rely on acoustic signaling. But devices that generate and send sound usually require batteries - bulky, short-lived batteries that need regular changing. Could we do without them? MIT researchers think so.