NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunar distance accuracy
From: Michael Daly
Date: 2007 Oct 24, 18:16 -0400
From: Michael Daly
Date: 2007 Oct 24, 18:16 -0400
George Huxtable wrote: > White uses a Troughton "pillar-sextant" from the early 1800s. That term has > been used elsewhere in two different contexts. > [...] > Otherwise (and this is the meaning that seems to be relevant here) it's a > sextant firmly mounted on a pillar stand, for use on land, not at sea. It is > usually arranged so that the whole sextant can be easily rotated about a > polar axis, parallel with that of the Earth, just as a telescope can. This should be called an equatorially-mounted sextant. With FRAS after his name (Fellow of the Royal Astronomical Society), he would likely have used this term or something very similar. This would lead me to expect 'pillar sextant' to mean 'double-frame sextant'. Mike --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---