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    Abbreviation of Nautical Mile
    From: John Kabel
    Date: 2005 Jun 7, 10:58 -0400

    An interesting question came up the other day as we were editing a course
    on Electronic Charting.  What is the accepted abbreviation of "nautical
    mile"?  We need a standard that can be applied across all Canadian Power
    and Sail Squadron courses.
    I did some searching and came up with the following, to start the
    - Bureau International des Poids et Mesures notes that there is no accepted
    symbol, though all agree on the distance measured (1852 metres)
    - neither the Canadian Metric Practice Guide nor the CSA publication
    International System of Units have an abbreviation in their tables
    - Wikipedia (the online encyclopedia) suggests that "nm" is preferred,
    especially in aeronautics
    - Canadian Hydrographic Service uses "M" in its Abbreviations
    - The NOAA Chart 1 (Abbreviations) lists all of "M", "Mi", "NM" and "N M"
    for "nautical mile(s)"
    - Nav Canada, the agency responsible for air traffic control in Canada,
    uses "NM"
    - Bowditch (1995) gives both "n.mi." and "NM" in Abbreviations and Acronyms
    So, what does the group think?  What is USPS usage?  What is Navy usage?
    Please reply either to the list or to me privately.
    John Kabel
    London, Ontario
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