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    Re: Latitude by law of cosines
    From: Fred Hebard
    Date: 2018 Jan 17, 00:02 -0500
    Chris,

    You could use lunars to determine your longitude or to determine GMT.  Pub 229 or the NA render the calculator and slide rule superfluous, although it would require some ingenuity to do lunars with 229.

    Fred

    Fred Hebard



    On Jan 16, 2018, at 6:03 PM, Chris Caswell <NoReply_Caswell@fer3.com> wrote:

    Frank,

    Thank you for your reply.  I was exploring it for a thought experiment of being "dropped" somewhere in the world could I find out where I was and what I would need.  It seems I would need a sextant, watch set to correct GMT, Pub 229, Nautical Almanac, and a scientific calculator or slide rule, if I wished to not use any electronics.  I realize the slide rule, with only 3 decimal places, would be less accurate.

    Chris in VT

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