NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: How Many Chronometers?
From: Jeremy C
Date: 2009 May 6, 19:42 -0700
From: Jeremy C
Date: 2009 May 6, 19:42 -0700
> Bruce Stark, when he was contributing to the list, offered a wonderful exposition on how to recover GMT via lunars. �The details are found in a NavList posting whose number I cannot remember. �I did keep a file of it though, and link it herein. �All the way from not knowing any time to GMT! I have not exercised the method and can offer no insight as to how accurately one can recover GMT from it. �Based upon the source, however, I suspect it works quite well! > > Best Regards > Brad > > Linked File:https://www.NavList.net/imgx/Recovering-GMT.doc I've used the Stark Lunar tables with good results. As long as you know the hour and a decent DR, you can use the tables to determine GMT via Lunars to the accuracy of your shooting ability. They take a while to reduce the sight however. What I wonder is what ships did in the age of steam before the age of common time ticks (say the early part of the 20th century). I haven't seen any ships with more than 2 chronometers on it, but my shipping experience is relatively short. When I worked with chronometers, we kept an error and rate log. The chronometers were serviced periodically and reset at that point. Nothwithstanding the early age of chronometers, what was the time solution in a more modern age? Does anyone have any data on this? Jeremy --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---