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Picture No 10724317
Date
Description How wireless beacons guide ships in the fog
Details

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.
Source Illustration by George Horace Davis in ‘Inside Knowledge’
Credit © Illustrated London News Ltd/Mary Evans
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