NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude of prime vertical sight
From: Paul Lee
Date: 2007 Jul 31, 03:44 -0700
From: Paul Lee
Date: 2007 Jul 31, 03:44 -0700
Hi Frank, The local sunrise had been determined in retrospect by an astronomical program. The prime vertical sight would be taken about this time. Best wishes Paul On 31 Jul, 00:31, Frank Reedwrote: > Hi Paul. You wrote: > > "I'm new to navigation, and am doing some work on the usage of prime > vertical sights. I know it gives longitude, but if you knew the time > of sunrise, is it possible to obtain a value for lattitude too? " > > Welcome aboard. I'm not entirely sure what you're asking here. Are you > saying that we've recorded the local time of sunrise? Perhaps at > sunrise we look at a watch and note that the time is 0701 and later > when we take the time sight the time is 0914. With that difference in > time and the measured altitude for the time sight, you could > presumably calculate the latitude. Is that what you have in mind? > > -FER --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---