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Thread: RAF/Air Min instructions "C.D."

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    Default RAF/Air Min instructions "C.D."

    I know about AD, AP, AMO, DTD (Circulars) etc but I have recently discovered a new abbreviation/acronym "C.D." it seems that it may be to do with signals or signals security.

    Can anyone help with the correct longhand form?

    Steve

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    CD normally stands for Coastal Defence, for example referring to coastal radar stations etc

    A

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    Dick/Amrit,
    "CD xxx" would possibly be Confidential Document No xxx. This was often, but not always, a Signals document (sometimes as big as a book!!). The details of Sqn strengths, movements, war plans, etc, etc, were contained in a CD. There was a similar system where the information was Secret, rather than just Confidential. In these cases the document/book was "SD xxx".
    HTH
    Peter Davies

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    Default RAF/Air Min instructions "C.D."

    Thank you gentlemen

    So far I think Peter's suggestion of "Confidential Document" fits best for me given the potential signals/wireless security context. There are a few hits on PROCAT which suggests it is correct.

    Steve

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