Underwater walkie-talkies could work long-distance with radio trick

Divers often struggle to communicate because radio waves can’t travel far through water, but a way to send the waves up and across the surface before dropping back down again could change that

​Divers often struggle to communicate because radio waves can’t travel far through water, but a way to send the waves up and across the surface before dropping back down again could change that Divers often struggle to communicate because radio waves can’t travel far through water, but a way to send the waves up and across the surface before dropping back down again could change that