NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Polar navigation
From: Gary LaPook
Date: 2009 Oct 19, 01:30 +0200
From: Gary LaPook
Date: 2009 Oct 19, 01:30 +0200
There were also the "Ellsworth Tables" that provided corrections to the straight line LOPs so that the pole could be used for a greater distance. These tables are similar to the correction tables found in H.O. 229. They were developed by Lincoln Ellsworth who first tried navigating over the North Pole in 1925. See http://www.south-pole.com/p0000110.htm about this harrowing adventure. gl bmorris@tactronics.com wrote: > Hi Peter > > >From Dutton's Navigation and Piloting, 1972. Article 4213 > > "One special method of plotting lines of position is available only in polar regions. Byt this method the pole is used as the AP ... This method was first suggested at least as early as 1892, but there is no evidence of its having been used until some 30 years later. In the early days of air exploration in polar regions the method was quite popular, but with the develpoment of modern tabular methods, it has fallen into disuse, except within 2 degrees of the pole." > > Dutton goes on to state that the method will be accurate for meridian alititudes at any latitude, as a special case. > > Dutton gives about 20 pages to special techniques used in the polar regions. > > Hope this helps! > > Best Regards > Brad > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com -~----------~----~----~----~------~----~------~--~---
