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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sight reduction methods
From: Andrés Ruiz
Date: 2015 Nov 6, 15:47 +0100
From: Andrés Ruiz
Date: 2015 Nov 6, 15:47 +0100
Hi John,
--
What if the sands of time are running low (like in the song...)? Nothing gonna happen on a XVIII vessel.
The main goal of Lunars, now and then, is to get GMT (UT) as you said. But what for?: calculating the longitude by time sight.
For Lunars apps, see:
regards.
2015-11-05 17:27 GMT+01:00 John D. Howard <NoReply_Howard@fer3.com>:
Andres,
Nice graph of sight reduction methods.
I do have a question. You put Lunar method under Longitude. I thought a lunar was used only to get a crude GMT ( GAT ) and that that time hack could be used as if from a clock. Historicaly the lunar method was used before the Sumner line so was used with a time sight to get longitude but can the lunar time hack be used like any other time hack with the St. Hilaire and HO 249?
Thanks. John H.
