NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Moon altitude problems.
From: Paul Hirose
Date: 2006 Aug 20, 21:25 -0500
George Huxtable wrote:
> bubble, and try to keep it there. How does that work out with the
> non-disc of the Moon, when only a part of that non-disc is the crisp
> edge of the appropriate limb? What do you centre, against what?
On shooting the moon with a bubble sextant, my 1955 U.S. Air Force
manual on air navigation says, "...Often the moon is not full and the
center is difficult to estimate. Therefore, observe either the top or
bottom portion of the moon and apply semi diameter correction..."
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From: Paul Hirose
Date: 2006 Aug 20, 21:25 -0500
George Huxtable wrote:
> bubble, and try to keep it there. How does that work out with the
> non-disc of the Moon, when only a part of that non-disc is the crisp
> edge of the appropriate limb? What do you centre, against what?
On shooting the moon with a bubble sextant, my 1955 U.S. Air Force
manual on air navigation says, "...Often the moon is not full and the
center is difficult to estimate. Therefore, observe either the top or
bottom portion of the moon and apply semi diameter correction..."
--
I block messages that contain attachments or HTML.
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
