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    Re: Sextant Terms
    From: Alexandre Eremenko
    Date: 2007 Oct 23, 10:13 -0400

    
    On Tue, 23 Oct 2007, [ISO-8859-1] Nicol�s de Hilster wrote:
    
    > For the Plath I am looking for the pentagon prism.
    > Anyone any idea where
    > to get one?
    
    Have you tried Cassens-Plath?
    
    Alex.
    
    > Nicol�s
    >
    >
    > Chuck Taylor wrote:
    > > The U.S. Coast Guard has historically used sextants for taking horizontal 
    angles in order to precisely place aids to navigation such as buoys. Given 
    that this example has no shades, I suspect that that was how this unit was 
    used.
    > >
    > > Chuck Taylor
    > >   48 N
    > > 122 W
    > >
    > > Nicol�s de Hilster wrote:
    > >
    > >
    > >>
    > >>
    > > There are surveyors sextants (C. Plath for instant) that have an
    > > additional pentagon prism attached. This prism adds 90 degrees to the
    > > observed angle, so measuring 140 degrees should be no problem with that
    > >
    > > prism attached.
    > >
    > > One has been for sale on E-bay recently:
    > > 
    http://cgi.ebay.co.uk/US-Coast-Guard-Weems-Plath-Sextant-w-Case_W0QQitemZ300160900331QQihZ020QQcategoryZ37971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
    > >
    > > Nicol�s
    > >
    > >
    > >
    > >
    > >
    > > __________________________________________________
    > > Do You Yahoo!?
    > > Tired of spam?  Yahoo! Mail has the best spam protection around
    > > http://mail.yahoo.com
    > >
    > > >
    > >
    > >
    > >
    >
    >
    > >
    >
    
    
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