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    Re: Buying a sextant- a cautionary tale.
    From: Alexandre Eremenko
    Date: 2006 Apr 30, 18:08 -0400

    In a previous message I suggested some alternative
    to displacing the index method.
    How large is the area on the arc that you cannot read?
    On Sun, 30 Apr 2006, George Huxtable wrote:
    > Frank wrote-
    > | By the way, as a hypothetical, how  could you use a sextant with a dead
    > | section, from whatever cause, close to zero  degrees? The sextant would certainly
    > | be a nuisance, but it would still  work.
    > I'm not sure. I can see that displacing the zero position of the sextant to 
    be on the working part of the arc, by misaligning the
    > adjustments of the mirrors, might work, depending on the range of adjustment 
    that was available. I doubt that would work, with the
    > instrument that I tried, because its blank-area was so wide. Does Frank have 
    a cleverer method, that would work with a Vernier
    > instrument?
    > George.
    > ============
    > contact George Huxtable at george@huxtable.u-net.com
    > or at +44 1865 820222 (from UK, 01865 820222)
    > or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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