Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    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
    >
    >
    >
    >
    >
    > __________________________________________________
    > Do You Yahoo!?
    > Tired of spam?  Yahoo! Mail has the best spam protection around 
    > http://mail.yahoo.com 
    >
    > >
    >
    >
    >   
    
    
    --~--~---------~--~----~------------~-------~--~----~
    To post to this group, send email to NavList@fer3.com
    To , send email to NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site