NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calibrating a sextant scale
From: Dan Allen
Date: 2007 Nov 25, 22:13 -0700
From: Dan Allen
Date: 2007 Nov 25, 22:13 -0700
On Nov 25, 2007, at 9:31 PM, frankreed@HistoricalAtlas.net wrote: > It does work. I've tried it in practice, and the results are > really excellent. The catch is that you need a location with a > fairly clear, > level horizon with a lot of well-defined points or vertical lines at > considerable distance. In the 18th century, a city on a level plain > with > numerous church steeples would fit the bill. Today, lighthouses or > other > navigational beacons around a relatively enclosed body of water work > just as > well. Frank: where did you do this? Perhaps a few such locations could be given on the list so we could go try this out... Dan PS - I see a new appendix in a future edition of Bowditch: a list of locations where sextant errors can be measured! --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
