NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: GPS shortcomings.
From: Carl Herzog
Date: 2005 Jun 9, 11:16 -0400
From: Carl Herzog
Date: 2005 Jun 9, 11:16 -0400
Dan Allen wrote: > I have not used a Davis Mk 15 or Mk 25, but I do own a Davis Mk 3, > the $34 Davis. > It is terrible: 20-50 mi accuracy. Maybe it warped and is atypical, > but the whole experience of using it is so bad that I just ignore it > now. I've used and taught with them all underway. The Mk3 is pretty worthless, except as a demonstration of principles. The Mk15/25 is perfectly usable for sun sights, but its optics don't cut it for star work. If you buy one new, take care of it, adjust as necessary and check index error with every shot, it makes a fine backup tool and learning sextant. However, for durability, accuracy, and optics that allow a broader range of use, pick up an Astra IIIB. It's definitely worth it. Can't beat it. Carl Herzog
