NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Horizontal Sextant angles plot.
From: Lu Abel
Date: 2012 Apr 5, 12:14 -0700
From: Lu Abel
Date: 2012 Apr 5, 12:14 -0700
The problem with "GPS as compass" is that GPSs can only determine position. Everything else that a GPS might show (especially direction of movement) is derived from a succession of positions.
Just to clarify, though -- if you have a landmark entered as a waypoint in your GPS (or, in the case of some GPSs like the Garmin 76, it's shown on a map or chart), and you ask for the bearing and distance to the landmark/waypoint, you will get a very accurate answer.
From: "eremenko@math.purdue.edu" <eremenko@math.purdue.edu>
To: NavList@fer3.com
Sent: Thursday, April 5, 2012 11:41 AM
Subject: [NavList] Re: Horizontal Sextant angles plot.
I am interested in details of the compass described by Byron Franklin
with accuracy 1/10 degree. Are they magnetic?
What is the size? Etc.
I own no GPS.
But I tried several GPS as compases, and they are much worse then
an ordinary pocket magnetic compass.
The best think I ever tried for taking a bearing was a 8x10 Steiner binocular
with a built in compass but I do not remember its scale...
Alex.
