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    Re: [Fwd: [Fwd: Davis Sextants]]
    From: Rick Emerson
    Date: 1999 Jan 26, 07:22 EST

    captainmike7@XXX.XXX writes:
     > I have not subjected my Davis Mk 25 to any scientific tests but, as stated
     > previously, from an exactly known location I have taken many sights over
     > the years with intercepts of 0-1 nm and dozens under 3 nm (the requirement
     > for Power Squadron exactly-known-position sights).  I have had none of the
     > maintenance or adjustment problems mentioned by others (Davis Mk 25 circa
     > 1983).
    "The proof of the pudding is in the eating" and I think the above
    adequately demonstrates that it is possible to get meaningful results
    from "a plastic sextant".  I want to be clear on this point because
    there have been commentators elsewhere who argue that sextants made
    from plastic, a priori, cannot give good results.
    It is my contention that a number of factors make getting these
    results more difficult than with metal-framed sextants such as (but
    hardly limited to) Astras.
    On class of sextants that I haven't worked with are the 7/8 size
    sextants.  Aside from taking up less space in the cabin, what
    advantage, if any do they offer?  Also, it seems the shorter index arm
    makes accuracy even more problematic.
    S/V One With The Wind, Baba 35
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