NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Moon altitude problems
From: James R. Van Zandt
Date: 2006 Aug 21, 22:01 -0500
Ken Gebhart wrote:
> As has been mentioned before, if the sextant is propped up, and the
> star is successively positioned against the top and bottom of the
> bubble, and the average of the two readings is taken, you have an
> extremely accurate observation. Seaman's eye is not needed.
It seems to me this is how to take lunar altitudes too. Align the
appropriate limb with the top then the bottom of the bubble, and
average the two readings. (Also average the two times.) No need for
visual centering.
- Jim Van Zandt
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From: James R. Van Zandt
Date: 2006 Aug 21, 22:01 -0500
Ken Gebhart wrote:
> As has been mentioned before, if the sextant is propped up, and the
> star is successively positioned against the top and bottom of the
> bubble, and the average of the two readings is taken, you have an
> extremely accurate observation. Seaman's eye is not needed.
It seems to me this is how to take lunar altitudes too. Align the
appropriate limb with the top then the bottom of the bubble, and
average the two readings. (Also average the two times.) No need for
visual centering.
- Jim Van Zandt
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
