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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant accuracy with short distance to horizon
From: UNK
Date: 2001 Jun 21, 8:05 AM
From: UNK
Date: 2001 Jun 21, 8:05 AM
Dan Allen [mailto:danallen@NWLINK.COM] asked: Simply put, is there a formula or correction to give greater accuracy to sextant shots taken using a very close horizon? If one knows the exact distance to the local horizon, can this be applied to the shot to give a more accurate reading of the angle of a celestial body? Table 14 in Bowditch gives the correction for a "short horizon". The "Explanation of Tables" section gives the formula. -- Peter
