One of the first acts by the Royal Navy during WW1was to have the German underwater telegraphic cables cut in the North Sea, thus denying them telegram communications with most of the world. It meant that they had to rely on high frequency radio transmissions to communicate with their embassies and overseas ships. Knowing this, the Admiralty engaged the help of Marconi and the Post Office to set up listening stations on the east coast of England to intercept the German sign