Enigma and the Codebreakers

Inside a 'Y' Station

Messages transmitted to and from U-boats were intercepted in Britain by Royal Air Force 'listening' stations, known as 'Y' Stations.

The 'Y' Stations also intercepted thousands of other enemy messages each day.

Outside a 'Y' Station a forest of tall aerials picked up radio signals from as far away as the Soviet Union and Japan.

Inside, a team of Morse code operators worked 24 hours a day, listening in to coded messages and writing them down.

Your job would be to translate the Morse signals into letters and write them down as fast as you could - at least 90 letters a minute. If you made just ONE mistake it would be impossible for the code-breakers to break the code.

Listen to the sounds you would have heard if you were one of the many servicewomen or civilians who worked at a secret 'Y' Station.

Imagine sitting in a cold wooden hut for eight hours at a time, wearing heavy headphones and writing down thousands of letters. The words made by these letters did not make any sense because they were in code. All you were told was that the work you were doing was vitally important and was helping to win the war...

Bletchley Park and the code-breakers

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