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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Very Small Altitude-Accurate Results
From: Bruce J. Pennino
Date: 2015 Aug 10, 12:29 -0700
From: Bruce J. Pennino
Date: 2015 Aug 10, 12:29 -0700
Hello:
Yesterday I did a LL sight just before sunset ( got delayed in traffic). Normally I try to have Ho greater than 10 degrees. My average Ho was 4 degr 35.2 minutues.I was shocked when my LOP went virtually through my position. Using my known latitude, I did a time-sight calc for longitude. Longitude was calculated to be 1 minute of actual longitude . Were my measured results just good fortune? Did the dip from table luckily coincide with dip for the atmospheric conditions? There was a crisp horizon and I was extra careful in "swinging" the instrument. My height of eye was only 14 ft, so dip angle was small. Anyone had good/bad results at very small angles??
Bruce
