NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Theoretical Question - Height of Eye from Shore
From: Peter Fogg
Date: 2007 Nov 17, 17:49 +1100
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From: Peter Fogg
Date: 2007 Nov 17, 17:49 +1100
Greg R. wrote:
Been there. Once you know the position then the only obvious variable can be the Height of Eye, that may have to a guesstimate.
It strikes me as quite amazing, but seems to be true, that you can work out fairly accurately the height of your local cliff via this process of making and reducing celestial observations.
I never thought of tidal influence but like your situation, tidal movements around here are fairly small.
... that's what prompted the question in the first place. Last time I
was out there taking sights I seemed to get some sort of "systemic
error" (referenced to a known GPS position) that I couldn't account
for. Index error is always dialed to zero on both the Davis and the
Astra sextants, and I couldn't believe that my technique had suddenly
gotten that "sloppy".
Been there. Once you know the position then the only obvious variable can be the Height of Eye, that may have to a guesstimate.
It strikes me as quite amazing, but seems to be true, that you can work out fairly accurately the height of your local cliff via this process of making and reducing celestial observations.
I never thought of tidal influence but like your situation, tidal movements around here are fairly small.
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To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
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