NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Back In Hobby: Some Questions, Please
From: Ken Muldrew
Date: 2007 Apr 27, 15:26 -0600
From: Ken Muldrew
Date: 2007 Apr 27, 15:26 -0600
On 27 Apr 2007 at 10:59, Alexandre E Eremenko wrote: > But the errors in LATITUDE are enormous by comparison: > 48', 6', 0', -1', 5', 5', 11', -2', -9', 0, -2', +4', > This is not what I would expect from artificial > horizon observations, even with a poor sextant. > Even if we discard the 2 outliers (possibly some blunders) > the average absolute error is 3.4' which is too large. > > Is it possible that some poor quality wood octant was used > for the altitudes, and a metal sextant for the lunars? No, he clearly states that he only has the one, metal sextant with him on that trip. It may have been a problem with his artificial horizon (non- parallel glass, for example) or else he just missed the noon sight due to the demands of his party. I have no other explanation for why his latitudes were so poor. Ken Muldrew. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---