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Series
Government Code and Cypher School: Naval Section: Reports of Japanese Naval Decrypts
Catalogue reference: HW 23
What's it about?
HW 23
This class contains decrypts of high medium and low grade Japanese naval cypher messages produced by the Naval Section of GC and CS Bletchley. These messages cover a wide range of subjects from supplies to engagements with allied ships and...
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 23
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Title (The name of the record)
- Government Code and Cypher School: Naval Section: Reports of Japanese Naval Decrypts
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Date (When the record was created)
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1940-1945
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Description (What the record is about)
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This class contains decrypts of high medium and low grade Japanese naval cypher messages produced by the Naval Section of GC and CS Bletchley. These messages cover a wide range of subjects from supplies to engagements with allied ships and aircraft. Also included in this class are reports describing the organisation and procedures of Japanese naval communications during this period.
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Arrangement (Information about the filing sequence or logical order of the record)
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Arrangement
Chronological
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Held by (Who holds the record)
- The National Archives, Kew
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Language (The language of the record)
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English
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Creator(s) (The creator of the record)
- Government Code and Cypher School, Naval Section, 1924-1946
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Physical description (The amount and form of the record)
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851 file(s)
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Access conditions (Information on conditions that restrict or affect access to the record)
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Open
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Immediate source of acquisition (When and where the record was acquired from)
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In 1999-2004 Government Communications Headquarters
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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- Topics
- Asia
- Intelligence
- Navy
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Accruals (Indicates whether the archive expects to receive further records in future)
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Series is not accruing
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Selection and destruction information (Information about how the record was selected for archiving)
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The entire series has been selected for permanent preservation
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C15122/
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
You are currently looking at the series: HW 23
Government Code and Cypher School: Naval Section: Reports of Japanese Naval Decrypts
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