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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Reset Watch via Time Sight
From: Bruce J. Pennino
Date: 2014 Jun 17, 23:28 -0400
From: Bruce J. Pennino
Date: 2014 Jun 17, 23:28 -0400
Hello Greg, Frank and All:
By plotting my data and taking a "best fit" point/sight, I calculated (standard equation) a time increase + 19 minutes 4 seconds. I deliberately altered the watch by retarding it 19 minutes 20 seconds.
The calculated results are quite good, I think, especially because the dip short distance is approximate (from a chart). Also, it was difficult to clearly see the water line "horizon" with a shadow from the sloping bank at the water's edge. This summer I'll go to another spot where the horizon is fully distant and get another set of data. Will try method suggested by FER.
Bruce
On Sat, Jun 7, 2014 at 6:36 PM, Greg Rudzinski wrote:
Attached is a recovery of time using Martelli Tables ( +19 minutes 12 seconds).
Attached File:
(Recover-Time-Martelli.jpg: Open and save)
