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Hello Sailor!The U.S. Navy is said to be field-testing a new short-range communications device called LightSpeed that could soon let sailors talk securely up to two miles apart - just by looking at each other. The device uses infrared to transmit audio and visual information, connected to ordinary binoculars and uses the optical lenses to amplify the signals. Navy personnel on either end can simply plug headphones and a microphone
into their binoculars to talk to one another. Australian Optical DX Group Source: Wireless Institute of Australia
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