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    Re: Most commonly used/preferred sextant among NavList members
    From: Greg B
    Date: 2015 Feb 01, 20:51 -0500

    Hi Dave,
             I also made a wooden instrument - a octant - it is not terribly
    accurate (+/- 5NM at best ) but as a historical
    reenactor I needed something that looked period (circa 1775) for
    "show-and-tell" demos. One of these days I am
    going to make another, or (if I can find one cheaply on ebay); restore
    one. I love navigation in this time period and
    have also made myself a log line and lead line. It is fun to do on the
    bay or sound.
    On 02/01/2015 04:11 PM, David Pike wrote:
    You can always make your own.  Around 1982, I had to make something as
    my final testpiece for my Post Graduate Certificate in Education as a
    tyro Craft, Design, and Technology teacher.  I'd always regretted
    allowing my mother to give my father's marine sextant away, and even the
    plastic ones seemed very expensive, so I decided to make my own out of
    plywood.  The trick is to make it big, as people like Tycho Brahe
    found.  Then cutting the scale is easy.  I seem to remember the
    technician in the workshop showing me how to use a dividing engine as a
    lathe attachement, but I'd never be able to remember how to use it now.
    I recall shooting stars on a bowl of water on a still night and being
    surprised to find the Hs was double what I'd expected.  Taking instant
    values compared to always using an averager were also a pleasant
    surprise.  I've got the shots I took somewhere around. As I recall it
    was accurate to 2 or3nm.  My problem is no natural horizon.  As soon as
    I get my new artificial horizon working, I'll have to start playing with
    the plywood again.  Dave

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