Details of the cypher used by Commander TA Detmers' to encode his account of the battle, 20 July 1945

Details of the cypher used by Commander TA Detmers' to encode his account of the battle, 20 July 1945

The photographs of Detmer's notebook were sent to FRUMEL, an inter-navy signals intelligence unit based in Melbourne. There, cryptographers determined the cypher in use and produced a translation of the notebook.

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