How wireless beacons guide ships in the fog
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How wireless beacons guide ships in the fog
The Marconi invention can determine distance of the ship from the beacon to steer the vessel into a Harbour during foggy weather. The shore transmitter operates on wave-lengths of about 60 centimetres, and its signals are received in two ways on board ship, one by headphones or loud-speaker, and the other by the movement of a needle on the galvanometer-dial fixed in a prominent postion before the navigator
Media ID 14146616
© Illustrated London News Ltd/Mary Evans
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