NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Interpolation to latitude
From: Henry Halboth
Date: 2009 Nov 12, 22:19 -0800
From: Henry Halboth
Date: 2009 Nov 12, 22:19 -0800
George,
Did you really have to ask this one, or perhaps I have just misunderstood your intent?? Regardless, I will answer - if just to show that I am still alive. Aboard any ship with which I have been familiar, since 1936, or thereabouts - and that includes American, British, German, Japanese, Chinese, Cuban, Chilean, South African, Panamanian, Liberian, and some that I have long since forgotten, both MM and Navy - GMT was kept by the Chronometer(s), from which time relating to Celestial Navigation was obtained, whether by use of deck watch, stop watch or just plain counting. The ship's daily activities and all clocks associated therewith were regulated to Zone Time, generally advanced or retarded 20-minutes per night watch when passing from one zone to another, so as to maintain some semblance of normalcy in daily living and to be in coincidence with the time being kept at the port of intended destination on arrival there. I did sail on one Panamanian Bark in the 1940s, from Panama City to Durban, aboard which LMT was kept and all daily activity clocks were reset at LAN, necessitating resetting to Zone Time on arrival at the port of destination. GMT was, however, kept by Chronometer when it was running. This was an unusual circumstance for the time. You can readily appreciate, I am sure, that any other method of time keeping could well result in Lunch in the dark, work in the dark, and Dinner at Meridian Transit, as well as possibly large time changes to coincide with Local Time on arrival at the port of destination. Regards, Henry --- On Thu, 11/12/09, George Huxtable <george@hux.me.uk> wrote:
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