NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Richard Gaarden
Date: 2013 Sep 30, 13:59 -0700
Once again, thank you for the good advice. I did find the article you referenced and it is all a person could ask for to document the "how to." I did once use a theodolite to find north in a manner which I fear will elicit laughter from this company. I reduced the aperture with duct tape on the sun shield, defocused the telescope, and knowing the time of the local zenith, tracked the sun by a projected image. Because it was defocused, I had the "compliment" of an umbra and penumbra which produced a bulls eye projected onto a card when aimed at the sun. I tracked for perhaps two minutes prior to culmination, and at the critical time stopped. the horizontal axis was locked and I then adjusted the vertical axis to allow me to located a pin on the meridian. I BELIEVE that the result was within of minute of correct. No sight reduction, if fact, no math and no need for a solar filter. Perhaps not a learned gentleman, but rather a country squire.
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