NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Poor St. Hilaire
From: Frank Reed
Date: 2007 Oct 27, 21:48 -0400
From: Frank Reed
Date: 2007 Oct 27, 21:48 -0400
Gary, you wrote: "Today, with programmable calculators, it is trivial to go back to Sumner's method and plot the LOP after determining two points using the "time sight" computation." Right. And one advantage of the Sumner approach compared to the St. Hilaire intercept approach is that you can use any old graph paper, including graph paper drawn up on the spot. With a Sumner line, it doesn't matter if you have the correct local scale for minutes of longitude. Sumner himself erred by suggesting that his lines should be drawn on a Mercator projection, and I suspect it slowed the adoption of the method. -FER --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---