German weather ship Lauenburg
Lauenburg was a German weather ship used in the early years of the Second World War to provide weather reports for German shipping, particularly German U-boats. After the German use of such vessels had been identified as a weakness that could be exploited to break the Enigma code, Lauenburg was captured and sunk on 28 June 1941. The Royal Navy acquired important German code books and parts of an Enigma machine.
HMS Tartar's boarding party prepares to board the weather ship Lauenburg north east of Jan Mayen
Lauenburg is sunk by Royal Navy gunfire
Sir Francis Harry Hinsley, was an English intelligence officer and historian. He worked at Bletchley Park during the Second World War and wrote widely on the history of international relations and British Intelligence during the Second World War. He was known as Harry Hinsley.
Photograph of British cryptoanalysts Harry Hinsley, Sir Edward Travis and John Tiltman