A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David C
Date: 2019 Sep 26, 21:05 -0700
Frank Reed wrote
No problem. Instead of calculating the azimuth, you can just run the time sight math a second time with a slightly different input latitude. That gives you two lat/lon pairs, and you draw your LOP through those two points.
Which is one half of a Sumner. Repeat with another lat/lng pair and you have s seconde LOP. The end result is the same as the St Hilaire method even though it isn't a St Hilaire.
A query - was "Sumner" included in the term "New Navigation" or was the latter just the St Hilaire?