NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: GPS and Great Circle
From: John Kabel
Date: 2002 Oct 8, 15:35 -0400
From: John Kabel
Date: 2002 Oct 8, 15:35 -0400
I have just done a quick experiment with my Lowrance Globalmap 100. Picking a waypoint due west of here sends me on a great circle route starting in a direction always north of west, the exact azimuth depending on how far around the globe I put the waypoint up to 180 degrees away. It is what I have always taught my GPS students: the receivers always send you on a Great Circle route. I don't know of any models which allow for rhumb line navigation. John Kabel London, Ontario, Canada > I am a lurker in this group and actually know only a smidge celestial > navigation. I hope my question is not out of place here. I am curious > whether my GPS follows the great circle route or Mercator rumb line when > plotting long distance courses? > Thanks for patience with the dummy, > Joe...
