The Goliath Transmitter

Goliath Transmitter

Communication with submarines is difficult because radio waves do not easily travel through salt water. The obvious solution is to surface and raise an antenna above the water, but surfacing makes the submarine visible to enemy ships and hence vulnerable. Another solution is to use a buoy carrying the antenna that is floated to the surface. The buoy is tethered to the submarine which remains well below the surface.


Source: amusingplanet.com

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