A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Francis Upchurch
Date: 2015 May 10, 23:09 -0700
Question, maybe for Frank. I know this has been discussed at length in the past,but I remain confused re the following:
Slocum says his old tin clock remained asleep. He estimated local time from LAN noon LAT? Correct?
How did he "advance" the noon LAT to the time of the lunars without any clock?
Even Cook on Endeavour needed a reasonably accurate watch to advance time sights, did he not?
My "no clock" method uses "simultaneous" :LDs, and moon and sun alts. I then do classic St Hilaire moon and sun LOP using the lunar GMT to get a 2 body fix. But I think Slocum did not use this, correct?
See attached paper. Still confused.