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    Re: Sextant Terms
    From: Nicol�s de Hilster
    Date: 2007 Oct 23, 07:58 +0200

    That is correct, hence the name 'surveyor's sextant'. I have two of 
    those at home (C. Plath and Observator) that have even been divided in 
    grads (so 400 degrees in a circle), a unit quite popular among 
    surveyors, at least in The Netherlands.
    
    For the Plath I am looking for the pentagon prism. Anyone any idea where 
    to get one?
    
    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
    >
    >
    >
    >
    >
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