Humphrey Sandwith

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Humphrey Robert Sandwith (born  June 19, 1894 ) was a British naval officer who was in charge of the radio interception service of the British Navy during the Second World War as Deputy Director Signals Division Y Service . He was head of DSD9 , an organization of the British Admiralty's Signals Division (SD9) , which operated the British radio bugging stations, and one of the three British participants in the legendary secret meeting of Pyry .

Life

Sandwith joined the Royal Navy on May 15, 1907 , was midshipman (German: Seekadett ) in January 1912 on the HMS Temeraire , a battleship of the British Home Fleet with 18,000 tons. Fifteen months later he was promoted to lieutenant (German: Leutnant zur See ), was a veteran of the First World War and after the war, in February 1924, when he served on the HMS Nelson , promoted to Lieutenant Commander . At that time, his intelligence skills were further trained. He learned both the flag alphabet and the use of wireless telegraphy and was promoted to Commander (German: Frigattenkapitän ) in December 1929 . In the following years he became a recognized authority in the field of radio technology , particularly for radio direction finding and radio reconnaissance .

On 26 and 27 July 1939 just five weeks before the outbreak of World War II Sandwith was one of three British, the non Alastair Denniston and Dilly Knox at the meeting of Pyry in the Kabaty Woods of Pyry with French and Polish cryptanalysts met in the the Polish code breakers of the Biuro Szyfrów (German: “Chiffrenbüro”) led by Marian Rejewski disclosed all their knowledge of the German Enigma rotor key machine to their allies.

During the Second World War Sandwith was first Assistant Director Signals Division , abbreviated ADSD (Y) , and from July 1941 its Deputy Director , abbreviated DDSD (Y) . In 1944, now with the rank of Captain (German: Kapitän zur See ), he was retired.

literature

  • Friedrich L. Bauer : Deciphered Secrets. Methods and maxims of cryptology. 3rd, revised and expanded edition. Springer, Berlin et al. 2000, ISBN 3-540-67931-6 .
  • Ralph Erskine : The Poles Reveal their Secrets - Alastair Dennistons's Account of the July 1939 Meeting at Pyry . Cryptologia . Rose-Hulman Institute of Technology. Taylor & Francis, Philadelphia PA 30.2006,4, pp. 294-395. ISSN  0161-1194
  • John Gallehawk: Third Person Singular (Warsaw, 1939) . Cryptologia. Rose-Hulman Institute of Technology. Taylor & Francis, Philadelphia PA 3.2006,3, pp. 193-198. ISSN  0161-1194
  • Francis Harry Hinsley , Alan Stripp: Codebreakers - The inside story of Bletchley Park . Oxford University Press, Reading, Berkshire 1993. ISBN 0-19-280132-5
  • Gordon Welchman : The Hut Six Story - Breaking the Enigma Codes . Allen Lane, London 1982; Cleobury Mortimer M&M, Baldwin Shropshire 2000. ISBN 0-947712-34-8

Individual evidence

  1. ↑ a b Sandwith, Humphrey Robert. In: The National Archives . Retrieved June 18, 2015 .
  2. ↑ Bletchley Park Roll of Honor master roll entry from BP (English). Retrieved June 9, 2015.
  3. ↑ Ralph Erskine : The Poles Reveal their Secrets - Alastair Dennistons's Account of the July 1939 Meeting at Pyry . Cryptologia. Rose-Hulman Institute of Technology. Taylor & Francis, Philadelphia PA 30.2006,4, p. 294. ISSN  0161-1194 .
  4. ↑ John Gallehawk: Third person singular (Warsaw, 1939) . Cryptologia. Rose-Hulman Institute of Technology. Taylor & Francis, Philadelphia PA 3.2006,3, p. 198
  5. ↑ Ralph Erskine: The Poles Reveal their Secrets - Alastair Dennistons's Account of the July 1939 Meeting at Pyry . Cryptologia. Rose-Hulman Institute of Technology. Taylor & Francis, Philadelphia PA 30.2006,4, p. 294
personal data
SURNAME Sandwith, Humphrey
ALTERNATIVE NAMES Sandwith, Humphrey Robert
BRIEF DESCRIPTION British naval officer and intelligence officer
DATE OF BIRTH June 19, 1894
DATE OF DEATH 20th century