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    Re: Uncommon navigational declination chart, 1850s
    From: Greg Rudzinski
    Date: 2018 Sep 9, 17:26 -0700

    Jack,

    Looks like a table for ex-meridians. Minutes of time from MP/LAN and the correction in minutes of arc to add to Ho. Similar to table 30 of the 1981 Bowditch.

    Greg Rudzinski

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