NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant Terms
From: Nicol�s de Hilster
Date: 2007 Oct 23, 07:58 +0200
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 -~----------~----~----~----~------~----~------~--~---