Researchers from the MIT lab have now taken a giant step towards solving a longstanding problem of wireless communication: direct transmission of information between underwater and airbone devices. Traditionally, underwater devices cannot share information with those on the land since they use a different wireless signal, which can operate only in their respective mediums. Now, researchers have developed a system, such that an underwater transmitter sends sonar signals to the surface of the water, which causes tiny vibrations. These signals are then picked up by sensitive receivers on the water surface and then transmit it upwards. Just above this transmitter is a high-frequency radar, which can then process these signals.

Read the full story: MIT news