NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Time of meridian passage accuracy
From: Douglas Denny
Date: 2009 Oct 1, 04:04 -0700
From: Douglas Denny
Date: 2009 Oct 1, 04:04 -0700
Since I had in mind nineteenth century sailing navigation and the religious zeal for a noon sight using meridian altitude; I had better modify my statement with a caveat:- "the effect is very small as to be of no practical concern to practical navigators....... of sailing boats". Sailing your boat at 300 knots is slightly different. Better then include Coriolis correction too! Douglas Denny. Chichester. England. ===================================== James N Wilson wrote: > Douglas: > > You state that "the effect is very small as to be of no practical concern to practical navigators." > > I compiled a table in my Navigation paper showing differences between maximum alititude and meridian passage ranging from 10 seconds to 37 minutes. My trial which led me to write the paper had a difference of a minute and a half, and that was at a moderate latitude and sailboat speeds. > > Jim Wilson --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
