NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant calibration. Re: Coordinates on Cook's maps
From: Alexandre Eremenko
Date: 2007 Apr 20, 17:33 -0700
From: Alexandre Eremenko
Date: 2007 Apr 20, 17:33 -0700
George, On Apr 20, 7:12 pm, "George Huxtable"wrote: > I don't regard that > zero deviation as rendering the instrument any more precise than another > calibrated instrument which has non-zero deviations, as long as the > navigator, when doing precise work, takes heed of those deviations pasted > into the box. A zero-certificate, especially one produced by a reputable independent agency like Kew, is an evidence of high quality workmanship. Lecky, when he gives advise how to buy a sextant says this (I cite by memory): go to the Kew observatory, they usually have many sextants of various brands tested at any time, and look which are the quality brands. Seems very reasonable to me. I add that I've never seen a British sextant of 1940 or later with zero certificate. In fact the only modern sextants WITH a certificate showing all zeros I've seen on e-bay are Tamayas and even these are rare. By "modern" I mean after 1940. Alex. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---